Which crisis involved a blockade of Berlin that required a massive airlift of supplies?

The Berlin Airlift is the correct response due to its historical context during the early Cold War when the Soviet Union imposed a blockade on West Berlin in 1948. This blockade was an attempt to gain control over the entire city by cutting off all ground access and thus starving the Western sectors of resources. In response, the United States and its allies implemented a massive airlift operation, known as the Berlin Airlift, which began in June 1948 and lasted until September 1949. During this time, aircraft delivered food, fuel, and other essential supplies to the residents of West Berlin, successfully circumventing the blockade. The airlift not only demonstrated the West's commitment to defending Berlin but also marked a significant event in the Cold War, symbolizing the struggle between capitalism and communism.

The other events listed, such as the Korean War and the Cuban Missile Crisis, involved their own distinct geopolitical tensions and military actions but did not include a blockade of Berlin or the specific operation of airlifting supplies to a beleaguered population. The division of Berlin and the construction of the Berlin Wall were later developments stemming from the earlier tensions and blockades, making the Berlin Airlift the most applicable answer to the question regarding the blockade of Berlin and