Though it never got "hot," the Cold War was a tense era until the dissolution of the USSR, and nothing symbolized the split more than the Berlin Wall, which literally divided the city. Berlin had been a flashpoint even before World War II ended, and the city was occupied by the different Allies even as the close of the war turned them into adversaries. After the Soviets' blockade of West Berlin was prevented by the Berlin Airlift, the Eastern Bloc and the Western powers continued to control different sections of the city, and by the 1960s, East Germany was pushing for a solution to the problem of an enclave of freedom within its borders. West Berlin was a haven for highly-educated East Germans who wanted freedom and a better life in the West, and this "brain drain" was threatening the survival of the East German economy. In order to stop this, access to the West through West Berlin had to be cut off, so in August 1961, Soviet premier Nikita Khrushchev authorized East German leader Walter Ulbricht to begin construction of what would become known as the Berlin Wall. The wall, begun on Sunday August 13, would eventually surround the city, in spite of global condemnation, and the Berlin Wall itself would become the symbol for Communist repression in the Eastern Bloc. It also ended Khrushchev's attempts to conclude a peace treaty among the Four Powers (the Soviets, the Americans, the United Kingdom, and France) and the two German states. The wall would serve as a perfect photo-opportunity for two presidents (Kennedy and Reagan) to hammer the Soviet Communists and their repression, but the Berlin Wall would stand for nearly 30 years, isolating the East from the West. It is estimated about 200 people would die trying to cross the wall to defect to the West.
