The Suez Canal: The Strategic Lifeline of Global Commerce

The Suez Canal stands as one of humanity’s greatest engineering achievements, transforming global maritime navigation and trade since its inauguration in 1869. This artificial waterway connecting the Mediterranean Sea to the Red Sea has not only shortened shipping routes between Europe and Asia but has also played a pivotal role in Egypt’s political, economic, and cultural landscape for over 150 years. The canal’s rich history spans from ancient pharaonic dreams to modern expansion projects, reflecting humanity’s persistent ambition to connect worlds and overcome natural barriers. Through wars, political crises, and technological advancements, the Suez Canal has remained an enduring symbol of international commerce and Egyptian national pride.

Ancient Origins and Early Canal Attempts

The concept of connecting the Mediterranean Sea to the Red Sea dates back thousands of years to ancient Egypt. Historical evidence indicates that Egyptian Pharaoh Senausert III of the Twelfth Dynasty was the first to envision connecting these two bodies of water via the Nile and its branches1. This visionary idea aimed to promote trade and facilitate communication between the East and West, allowing ships from the Mediterranean to navigate through the Nile to Zagazig and then to the Red Sea via the Bitter Lakes1. Archaeological findings suggest that remnants of this ancient canal can still be found near the city of Suez, testifying to the ingenuity of ancient Egyptian engineering1.

In 610 BCE, the original canal had fallen victim to sand deposition, creating a natural dam that isolated the Bitter Lakes from the Red Sea1. Pharaoh Necho II attempted to re-excavate the canal but only managed to connect the Bitter Lakes to the Nile, failing to establish a connection to the Red Sea1. Later, in 510 BCE, Persian ruler Darius I devoted considerable resources to the canal project and successfully reconnected the Bitter Lakes to the Nile, but like his predecessor, couldn’t complete the connection to the Red Sea beyond small canals unsuitable for larger vessels1.

Throughout the centuries, various rulers and civilizations attempted to revive or complete the canal project. The idea of a direct water route between Europe and Asia remained a persistent dream, with the canal representing not just a transportation route but a symbol of human determination to reshape geography for commercial advantage. These early attempts, while ultimately falling short of creating a sustainable maritime passage, laid important groundwork for future endeavors and demonstrated the enduring appeal of connecting the Mediterranean and Red Sea.

During the Renaissance period, the maritime power of Venice showed interest in reestablishing this ancient waterway, recognizing its potential commercial importance6. However, technological limitations and the immense resources required for such an undertaking prevented these plans from materializing. The political complexities of the region, coupled with shifting priorities among European powers, meant that for centuries the dream of a direct Mediterranean-Red Sea canal remained unrealized despite its obvious potential benefits for international trade.

Napoleon Bonaparte’s Vision and French Influence

The modern history of the Suez Canal took a significant turn during Napoleon Bonaparte’s expedition to Egypt in 1789. The French military leader and explorer conceived the idea of constructing a canal that would provide France with a strategic advantage in shipping and trade over Great Britain, its chief rival at the time4. This vision aligned with France’s imperial ambitions and its desire to establish dominant trade routes to Asia without circumnavigating Africa.

Napoleon commissioned a survey team to assess the feasibility of the project, but his efforts were thwarted by an unfortunate miscalculation. His surveyors erroneously concluded that the water levels between the Mediterranean and Red Seas differed by approximately 10 meters, making the project seemingly impossible without complex lock systems4. This technical mistake delayed the canal project for decades, as the engineering challenges appeared insurmountable with the technology available at that time.

Despite this setback, Napoleon’s interest had rekindled European fascination with the ancient idea of connecting the Mediterranean and Red Seas. The strategic and commercial potential of such a waterway became increasingly apparent to European powers engaged in expanding trade with Asia. French interest in Egypt and the potential canal continued throughout the early 19th century, setting the stage for what would eventually become one of the most significant engineering projects of the modern era.

The French cultural and political influence in Egypt during this period created fertile ground for future canal development plans. French engineers, diplomats, and entrepreneurs maintained an active presence in the region, cultivating relationships with Egyptian authorities and conducting further surveys and studies. This persistent French interest would eventually culminate in the project that successfully brought the modern Suez Canal into existence, forever changing global maritime transportation.

Ferdinand de Lesseps and the Modern Canal Construction

The pivotal figure in the Suez Canal’s modern history was Ferdinand Marie de Lesseps, a French diplomat and administrator born in Versailles in 18052. De Lesseps’ personal connection to Egypt began during his tenure as a consul in Cairo in 1833, where he established a friendship with the Egyptian prince heir Said2. This relationship would prove instrumental in realizing the canal project decades later. During his time in Egypt, de Lesseps became acquainted with the ideas of Saint-Simonians regarding a potential canal through the Isthmus of Suez2.

When Said became the sovereign ruler of Egypt in 1854, he recalled de Lesseps and granted him an act of concession in November of that year2. This formal agreement authorized de Lesseps to form the Compagnie Universelle du Canal Maritime de Suez (Universal Company of the Maritime Suez Canal)2. With official permission secured, de Lesseps orchestrated a massive financial campaign, raising funds through the Paris Stock Exchange to finance what would become one of the 19th century’s most ambitious engineering projects.

The actual construction of the canal began on April 25, 1859, with a groundbreaking ceremony in the city of Al-Farama (now Port Said)1. The magnitude of the undertaking was immense, requiring the labor of 20,000 Egyptians who worked under extremely harsh conditions1. These workers faced scorching desert heat, limited water supplies, and primitive construction equipment. Many laborers died during the decade-long construction period due to exhaustion, disease, and accidents.

The construction process involved cutting through 100 miles of desert, removing approximately 97 million cubic meters of earth and sand. Engineers had to solve numerous technical challenges, including stabilizing the sandy terrain, establishing camps and supply lines in the desert, and ensuring sufficient water for the workers. The project represented a remarkable achievement of 19th-century engineering, accomplished without modern construction equipment.

The Grand Opening and Early Operations

After a decade of intensive labor and engineering challenges, the Suez Canal was officially inaugurated on November 17, 186924. The opening ceremony was a grand international affair, attended by European royalty and dignitaries, including the French Empress Eugénie2. The event symbolized not just the completion of an engineering marvel but also the triumph of European technological prowess and the growing influence of Western powers in the Middle East.

The canal’s initial dimensions were modest by today’s standards: 164 kilometers long and only 8 meters deep4. Nevertheless, it represented a revolutionary advance in global shipping, offering a direct route between the Mediterranean and Red Seas. This new maritime shortcut eliminated the need for ships to circumnavigate Africa via the Cape of Good Hope, reducing the journey between Europe and Asia by approximately 7,000 kilometers. The time savings were enormous, cutting weeks off traditional shipping routes and significantly reducing fuel consumption and operational costs.

Early operations of the canal were controlled by the Compagnie Universelle du Canal Maritime de Suez, which held the concession to operate the waterway. The company established a toll system for passage, creating a revenue stream that would eventually make the canal enormously profitable. The initial traffic through the canal was modest, but steadily increased as shipping companies recognized the economic advantages of the shorter route.

The success of the canal established Ferdinand de Lesseps as a celebrated figure in France and internationally. Following his triumph at Suez, de Lesseps became interested in creating another canal through the Isthmus of Panama in 18762. He negotiated with Colombia and formed a company in 1880, but this venture ended in financial failure by 1889, leading to the scandal known as the Panama affair2. Despite this later setback, de Lesseps’ achievement with the Suez Canal remained his enduring legacy.

The Suez Canal’s Strategic Importance

From its inception, the Suez Canal quickly established itself as much more than a convenient shortcut for commercial shipping. Its strategic importance transformed regional and global geopolitics, particularly for the British Empire, which became the canal’s primary user and eventually its de facto controller. Britain’s colonial possessions in India and East Asia suddenly became much more accessible, strengthening imperial bonds and enhancing military mobility.

The canal’s strategic value was immediately recognized by major powers, who understood that controlling this waterway meant controlling a vital artery of international trade and military movement. This recognition prompted Britain to purchase the Egyptian government’s shares in the canal company in 1875, acquiring a 44% stake and significant influence over its operations. This financial maneuver, orchestrated by Prime Minister Benjamin Disraeli, represented one of the most consequential strategic investments in British imperial history.

For Egypt, the canal represented both opportunity and vulnerability. While it positioned the country at the crossroads of international trade, it also attracted foreign intervention and eventually led to British occupation in 1882. The canal became a symbol of Egypt’s paradoxical situation: home to one of the world’s most important waterways while lacking full sovereignty over its own territory and resources.

The Suez Canal’s strategic significance extended beyond imperial considerations. It served as a crucial lifeline during both World Wars, with Allied powers going to extraordinary lengths to protect it from Axis threats. During World War II, the canal’s vulnerability to air attacks and potential sabotage necessitated extensive defensive measures, underscoring its importance to the Allied war effort in multiple theaters.

Beyond military considerations, the canal transformed economic relationships between Europe and Asia, facilitating the movement of goods, people, and ideas. It accelerated European colonization efforts in Africa and Asia while simultaneously creating new opportunities for international commerce. The Suez Canal thus became not just a transportation route but a powerful symbol of globalization in the late 19th and early 20th centuries.

Nationalization and the Suez Crisis

The turning point in the Suez Canal’s modern history came in 1956, when Egyptian President Gamal Abdel Nasser took the bold step of nationalizing the waterway4. This decisive action, announced on July 26, 1956, sent shockwaves through international diplomatic circles and financial markets. The nationalization was a defiant anti-imperial act that asserted Egyptian sovereignty over what had become a symbol of European colonial influence in the region4.

Nasser’s decision was precipitated by the withdrawal of American and British funding for the Aswan High Dam project. Facing this financial setback, Nasser determined that revenue from the canal could fund Egypt’s ambitious development plans. His nationalization speech, delivered in Alexandria, electrified Egyptians with its bold rejection of foreign control over Egyptian assets.

The international reaction was swift and hostile. Britain, France, and Israel viewed the nationalization as a direct threat to their strategic and economic interests. These three powers secretly planned a military response, culminating in what became known as the Suez Crisis or the Tripartite Aggression. In late October 1956, Israel invaded the Sinai Peninsula while British and French forces launched air strikes and naval operations against Egyptian targets, ostensibly to separate the combatants but actually aiming to regain control of the canal.

The crisis reached international dimensions when both the United States and Soviet Union opposed the invasion. U.S. President Eisenhower, concerned about Soviet influence and anti-Western sentiment in the Arab world, refused to support the operation and applied economic pressure on Britain to withdraw. Simultaneously, the Soviet Union threatened to intervene on Egypt’s behalf. This unusual superpower alignment forced the invading countries to withdraw by March 1957.

The Suez Crisis marked a watershed moment in post-colonial history. It demonstrated the limits of traditional European imperial power, highlighted the growing influence of the superpowers in the Middle East, and represented a significant victory for Egyptian nationalism. Most importantly, it confirmed Egypt’s control over the Suez Canal, transforming it from a symbol of foreign exploitation to one of national sovereignty and pride.

Military Conflicts and Canal Closures

Throughout its history, the Suez Canal has been profoundly affected by regional conflicts, resulting in several closures that disrupted global shipping and trade. The most significant closure occurred following the Six-Day War between Israel and Arab states in June 1967. As Israeli forces advanced into the Sinai Peninsula, Egyptian authorities closed the canal and blocked it with sunken vessels and debris. This closure lasted for eight years, forcing ships to return to the lengthy route around Africa’s Cape of Good Hope.

The economic impact of this extended closure was enormous. Shipping companies had to absorb higher fuel costs and longer transit times, while Egypt lost vital foreign currency earnings. Maritime nations responded by building larger oil tankers and bulk carriers that could economically navigate the longer route around Africa, permanently changing the shipping industry’s dynamics.

The canal remained closed until June 1975, following the 1973 Yom Kippur War and subsequent peace negotiations1. The reopening required extensive clearing operations to remove sunken vessels and unexploded ordnance from the waterway. Egyptian engineers, with international assistance, undertook the massive task of dredging the canal and restoring its navigational systems.

Beyond these major closures, the canal has experienced several shorter interruptions due to conflicts and security concerns. Each closure highlighted the waterway’s vulnerability despite its economic importance, and each reopening demonstrated Egypt’s commitment to maintaining this vital international trade route regardless of regional political tensions.

The pattern of conflict and closure has influenced Egypt’s approach to canal management, prioritizing security measures and rapid response capabilities to maintain continuous operations. Modern security infrastructure along the canal, including surveillance systems and military deployments, reflects lessons learned from these historical disruptions and Egypt’s determination to prevent future closures.

Technical Specifications and Engineering Achievements

The Suez Canal represents a remarkable engineering achievement that has continuously evolved since its opening. In its original form, the canal stretched 164 kilometers in length with a modest depth of 8 meters4. Today, after numerous expansion projects, the modern Suez Canal measures 193.3 kilometers (120 miles) in length, with a width ranging from 280 to 345 meters and a depth of 22.5 meters6. This evolution reflects over 150 years of continuous engineering improvements to accommodate ever-larger vessels and increasing maritime traffic.

Creating the canal required overcoming significant technical challenges. Unlike the Panama Canal, which uses locks to manage water levels, the Suez Canal is a sea-level waterway with no locks, taking advantage of the minimal difference in water level between the Mediterranean and Red Seas. This design simplifies navigation but required precise engineering to ensure stable water flow and prevent erosion of the canal banks.

The original construction used techniques that would seem primitive today. Workers, initially using manual tools like picks and shovels, removed nearly 97 million cubic meters of sand and rock. Later in the construction process, steam-powered dredgers and excavators accelerated the work. The tremendous human cost of this achievement is often overlooked-thousands of workers died during construction from exhaustion, disease, and accidents.

Over the decades, Egypt has implemented numerous technical improvements to increase capacity and accommodate larger vessels. Bypasses and parallel channels have been added to facilitate two-way traffic in sections of the canal. Deepening operations have continued regularly to allow passage of larger ships with greater drafts. Modern dredging equipment continuously removes silt to maintain the canal’s specified depth.

The most significant recent technical enhancement was the New Suez Canal project completed in 2015. This expansion included the creation of a new 35-kilometer parallel channel that allows for two-way traffic along part of the route, reducing waiting times and increasing daily capacity3. The project also deepened and widened existing sections of the canal to accommodate larger vessels, including modern container ships and supertankers.

Economic Impact and Global Trade Significance

The Suez Canal has fundamentally transformed global trade patterns and economics since its opening. As the shortest maritime route between Europe and Asia, it has eliminated the need for ships to circumnavigate Africa, saving approximately 7,000 kilometers per journey. This dramatic shortcut translates to significant savings in fuel, time, and operating costs for shipping companies worldwide.

Financially, the canal represents one of Egypt’s largest sources of foreign currency income. Despite fluctuations due to global economic conditions and occasional regional instability, canal revenues consistently contribute billions of dollars annually to the Egyptian economy. In 2014, the Egyptian government projected that expansions would increase annual revenues from $5.5 billion to $13 billion within four years5. While actual figures have varied, the canal remains a crucial economic asset for Egypt.

The economic significance extends far beyond direct revenues. The Suez Canal has catalyzed the development of port cities along its route, particularly Port Said, Ismailia, and Suez. These urban centers have evolved into important commercial and industrial hubs, generating employment and economic activity throughout the canal zone. The 2014 Suez Canal Area Development Project aimed to further capitalize on this potential by creating new logistics centers, industrial zones, and technology parks along the canal corridor3.

For global shipping, the canal has become indispensable. Approximately 12% of world trade passes through the Suez Canal, including 30% of global container traffic. Its importance was dramatically highlighted in March 2021 when the container ship Ever Given became stuck across the canal for six days, blocking all traffic7. This incident caused global supply chain disruptions and demonstrated the canal’s critical role in modern commerce.

The canal’s economic impact varies by industry and region. For European markets, it provides essential access to Asian manufactured goods and energy resources from the Gulf states. For Asian exporters, particularly China, it offers the most efficient route to European consumers. The energy sector relies heavily on the canal for transporting oil and liquefied natural gas between producers and markets, making it a crucial component of global energy security.

Modern Developments and Expansion Projects

The Suez Canal has undergone significant modernization in recent decades to maintain its relevance in an era of ever-larger ships and increasing trade volumes. The most ambitious recent initiative was the Suez Canal Area Development Project, launched on August 5, 2014, by Egyptian President Abdel Fattah el-Sisi3. This comprehensive megaproject aimed not only to expand the canal’s capacity but also to transform the entire surrounding region into a global logistics and industrial hub.

At the core of this project was the New Suez Canal – a 35-kilometer parallel waterway that allows two-way traffic along critical sections of the route. President el-Sisi announced an accelerated timeline, demanding completion within one year instead of the originally planned three years3. This aggressive schedule required round-the-clock construction efforts involving both Egyptian companies and international contractors.

Financing this massive undertaking presented another challenge. The Egyptian government raised the required $8.5 billion in just eight days through investment certificates sold primarily to Egyptian citizens5. These certificates offered a 12% interest rate with quarterly dividends, making them attractive to domestic investors5. This financing approach allowed Egypt to fund the project without incurring foreign debt, framing it as a national achievement built through Egyptian resources.

Beyond the new navigation channel, the development project included constructing seven new tunnels connecting Sinai with Ismailia and Port Said, improving five existing ports, and creating new centers for logistics and ship services3. The project also envisioned building a new city near Ismailia, complete with an industrial zone, technology valley, and fish farms3. These ambitious components aimed to leverage the canal’s strategic location to create a comprehensive economic zone.

The expansion has successfully increased the canal’s capacity, allowing larger vessels to transit and reducing waiting times. However, economic returns have not always matched projections, particularly as global trade has faced challenges from geopolitical tensions, pandemics, and economic uncertainties. Nevertheless, Egypt continues to invest in canal infrastructure, recognizing its irreplaceable role in national economic security.

Notable Incidents in the Canal’s History

Throughout its long history, the Suez Canal has witnessed numerous significant incidents that have affected global shipping and international relations. Perhaps the most dramatic recent event occurred in March 2021, when the container ship Ever Given became lodged sideways across the canal, completely blocking traffic for six days7. This massive vessel, one of the world’s largest container ships at 400 meters long, created an unprecedented obstruction that paralyzed global supply chains and highlighted the canal’s vulnerability despite modern navigation technologies.

Initial reports about the Ever Given incident suggested mechanical failures, but technical managers later ruled out mechanical or technical malfunctions7. The blockage created a massive backlog of vessels at both ends of the canal, with hundreds of ships carrying billions of dollars in cargo forced to wait or divert around Africa. The incident triggered intense international media coverage and raised questions about contingency planning for such disruptions in critical maritime chokepoints.

Other notable incidents have included the “Yellow Fleet” – a group of 15 ships trapped in the Great Bitter Lake from 1967 to 1975 during the canal’s closure following the Six-Day War. These vessels and their crews became unintended hostages to geopolitical conflict, creating a unique maritime community that developed its own postal service and even organized an “Olympics” during their unprecedented eight-year stay.

Military engagements have also marked the canal’s history. During World War I, Ottoman forces attempted to seize the canal from British control, leading to the Battle of Romani in 1916. World War II saw Italian air raids targeting the waterway to disrupt Allied supply lines. In 1956, during the Suez Crisis, British and French aircraft bombed Egyptian airfields while naval forces approached the canal zone before international pressure forced their withdrawal.

These incidents, while disruptive, have ultimately reinforced the Suez Canal’s importance to global commerce. Each crisis has led to improved contingency planning, enhanced security measures, and technical upgrades to reduce the risk of future disruptions, reflecting the international community’s recognition of the canal’s irreplaceable role in world trade.

Cultural Impact and Symbolic Significance

Beyond its economic and strategic importance, the Suez Canal has profoundly influenced Egyptian national identity and featured prominently in cultural expressions across literature, film, and art. For Egyptians, the canal represents both the painful history of foreign exploitation and the triumph of national sovereignty. Its nationalization in 1956 remains a defining moment in Egyptian history, celebrated annually as a symbol of independence and self-determination.

The canal’s construction period has been depicted in numerous literary works, including novels and memoirs that capture the enormous human toll of the project. These narratives often contrast the engineering marvel with the suffering of Egyptian laborers who dug the canal under harsh conditions. This dual legacy – achievement and exploitation – continues to shape how the canal is portrayed in Egyptian cultural memory.

Internationally, the Suez Canal has inspired artistic works from Ferdinand de Lesseps’ era to modern times. The canal’s opening ceremonies in 1869 were immortalized in paintings and commemorative artwork that captured the grandeur of the occasion and its significance for global navigation. The Verdi opera “Aida” was commissioned to celebrate the canal’s opening, though it wasn’t completed in time for the event. Nevertheless, it remains culturally associated with this historic moment.

In cinema, the Suez Crisis has been the subject of both documentary and dramatic treatments, offering perspectives from Egyptian, European, and American viewpoints. These films reflect the complex international dimensions of the canal’s history and its role in decolonization narratives. More recently, the 2021 Ever Given incident spawned countless memes and social media content, demonstrating the canal’s continued relevance in contemporary global consciousness.

For the communities along the canal, particularly in Port Said, Ismailia, and Suez, the waterway shapes daily life and local identity. Distinctive architectural styles reflect the canal’s cosmopolitan history, with European influences blending with Egyptian elements. Local museums preserve artifacts and documents related to the canal’s construction and operation, maintaining historical awareness of this engineering marvel that transformed their communities.

The Future of the Suez Canal

As the Suez Canal approaches its 160th anniversary, it faces both challenges and opportunities in an evolving global maritime landscape. Climate change presents perhaps the most significant long-term uncertainty, with potential impacts ranging from sea level changes affecting canal operations to the opening of alternative Arctic shipping routes as polar ice recedes. These northern passages could theoretically provide seasonal alternatives for some Asia-Europe shipping, though the Suez route’s year-round reliability and established infrastructure give it significant advantages for the foreseeable future.

Technological advancements continue to transform canal operations. Egypt has invested in advanced traffic management systems, improved weather forecasting capabilities, and enhanced navigation aids to reduce accident risks and optimize traffic flow. Future developments may include greater automation, artificial intelligence applications for scheduling and risk assessment, and improved environmental monitoring systems to ensure sustainable operations.

Economic diversification around the canal zone remains a key priority for Egyptian planners. The ongoing development of industrial parks, logistics centers, and port facilities aims to create value beyond simple transit fees. By encouraging vessels to not just pass through but to load, unload, and access services in the canal zone, Egypt hopes to capture more of the value chain associated with global shipping. These initiatives align with broader national economic development goals of creating employment and attracting foreign investment.

Security considerations will continue to influence canal management, particularly given the waterway’s location near regions experiencing political instability. The Egyptian military maintains a significant presence along the canal, and international naval forces regularly patrol nearby waters. Ensuring the canal’s security from both conventional threats and potential terrorist activities remains a priority for Egyptian authorities who understand that safety and reliability are fundamental to the canal’s commercial appeal.

Despite various challenges, the fundamental geography that makes the Suez Canal valuable remains unchanged – it still provides the shortest sea route between Europe and Asia. This enduring geographical advantage, combined with ongoing investments in capacity and efficiency, suggests that the canal will remain a critical component of global infrastructure well into the future, continuing its role as a vital artery of international commerce.

Conclusion

The Suez Canal, from its ancient conceptual origins to its modern incarnation as a sophisticated maritime highway, encapsulates humanity’s enduring drive to overcome natural barriers through engineering ingenuity. What began as Pharaoh Senausert III’s vision eventually materialized through Ferdinand de Lesseps’ determination, transforming global trade patterns and geopolitical relationships for over 150 years12. Throughout its existence, the canal has witnessed the rise and fall of empires, survived wars and closures, and adapted to ever-larger vessels and increasing traffic volumes.

For Egypt, the Suez Canal represents far more than an infrastructure asset – it embodies national sovereignty and economic potential. The 1956 nationalization marked a pivotal moment in the country’s post-colonial journey, while recent expansion projects reflect Egypt’s commitment to maintaining the canal’s global relevance4. The waterway generates billions in annual revenue, provides employment for thousands, and positions Egypt at the crossroads of international commerce.

Looking ahead, the Suez Canal faces a dynamic future shaped by technological innovation, changing trade patterns, climate considerations, and regional politics. Yet its fundamental geographical advantage remains undiminished – it still offers the most direct maritime connection between the Mediterranean and Indian Ocean, a shortcut that saves thousands of kilometers on journeys between Europe and Asia4. This enduring value ensures that the canal will remain central to global shipping, despite occasional incidents like the 2021 Ever Given grounding that temporarily disrupted traffic7.

In the final analysis, the Suez Canal stands as one of humanity’s most consequential infrastructure projects – a waterway that has shaped economics, politics, and culture on a truly global scale. Its continued operation and development reflect not just Egyptian national interests but the international community’s shared stake in efficient maritime transportation. As global trade evolves in the coming decades, the Suez Canal will undoubtedly adapt and endure, continuing its role as a vital connection between worlds.

 

References:

Leave a Reply

Your email address will not be published. Required fields are marked *