- U2 crisis 1960
- The Lockheed U2 spy plane was used for covert espionage missions, it was used to fly over Russia to gather intel about their missiles.
- When the summit met on 14 May, Khrushchev demanded that the US president, Eisenhower apologises. When Eisenhower refused, Khrushchev went home.
- 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
- This caused a lot of tension between the countries and ruined the summit and the peace proposal.