In the West, Khrushchev's Thaw is known as a temporary thaw in the icy tension between the United States and the USSR during the Cold War. The tensions were able to thaw because of Khrushchev's de-Stalinization of the USSR and peaceful coexistence theory and also because of US President Eisenhower's cautious attitude and peace attempts. For example, both leaders attempted to achieve peace by attending the 1955 Geneva International Peace Summit and developing the Open Skies Policy and Quest for Arms Agreement. The leaders' attitudes allowed them to, as Khrushchev put it, "break the ice."