The U2 incident
By the late 1950s tension had increased between the two superpowers, the USSR and USA. A summit was arranged in Paris to try to sort things out, but shortly before it was due to take place an American U2 spy plane was shot down over Russia and the summit collapsed.
By the end of the 1950s, there was massive tension in the Cold War:
On 1st May 1960 - thirteen days before the summit - an American U2 spy plane was shot down over Russia and the pilot, Gary Powers, was captured. At first, the Americans tried to say that it was a weather plane, but they were forced to admit that it was a spy plane when the Russians revealed that much of his plane had survived, and that they had captured Gary Powers alive.
When the summit met on 14 May, the first thing Khrushchev did was to demand that the US president, Eisenhower, apologise. When Eisenhower refused, Khrushchev went home.
The Cold War had just become substantially more dangerous.
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