The Russians caused it by blockading Berlin.
The Berlin Crisis of 1961 began with the Soviet Union building a wall between East and West Berlin. The Soviets shut off access to West Berlin. The Allies responded with the Berlin Airlift and the crisis was resolved.
The crisis in Berlin confirmed that a reunited Germany was essential to the future of Europe.
The Berlin Crisis was solved by the Berlin Airlift. For several months in 1961 thousands of tons of supplies were flown into West Berlin. This broke the blockade of Berlin by the Soviets.
Berlin wall.
The Berlin Crisis of 1958 developed as a result of tensions between the Soviet Union and the Western powers over the status of West Berlin. The Soviet Union demanded that the Western powers withdraw their troops from West Berlin and threatened to hand over control of access points to East Germany. This led to increased military buildup and heightened fears of a potential conflict between the two sides. Ultimately, negotiations and diplomatic efforts helped defuse the crisis.
the Berlin wall the separation of west Berlin and east Germany
Nikita Khrushchev from Germany debated against Kennedy during the Berlin Crisis.
K
the tore it down
Your question is vague, so the only crisis dealing with Berlin that I can think of would be the Berlin airlift. If this is the case JFK was not in office in 1949. He wasn't elected president until 1960. If you mean the Cuban crisis that is a different story.
Berlin Wall.
Cold War politics between, in the media oversimplification, Khrushchev on the Soviet Side and Kennedy on the US and Western side ( Ich Bin ein Berliner- I am a Berliner!) went the slogan. the crisis ultimately culminated in the erection and fortification of the now-defunct Berlin wall. While Berlin was a divided city since the end of War II (and there were separate US, British, French, and Soviet sectors, the infamous wall was not actually erected until after l96l. Thus the Berlin WALL proper did not figure in the Berlin airlift in the late forties.