Cuban Project by late August, the Soviet military build-up in Cuba disgruntled the Kennedy administration. The fear of open military retaliation against the United States and Berlin for the US covert operations in Cuba slowed down the operation. By October, as the Cuban Missile Crisis heated up, President Kennedy demanded the cessation of Operation Mongoose. Operation Mongoose formally ceased its activities at the end of 1962. The first assassination plots began in the late summer of 1960, according to the Church Committee’s documentation. Some of the plots and ideas ranged from “poisoned pills, an exploding seashell, and a planned gift of a
Cuban Missile Crisis wrote, "too young, intellectual, not prepared well for decision making in crisis situations... too intelligent and too weak." US covert operations against Cuba continued in 1961 with the unsuccessful Operation Mongoose. In addition, Khrushchev's impression of Kennedy's weaknesses was confirmed by the President's response during the Berlin Crisis of 1961, particularly to the building of the Berlin Wall. Speaking to Soviet officials in the aftermath of the crisis, Khrushchev asserted, "I know for certain that Kennedy doesn't have a strong background, nor, generally speaking, does he have the courage to stand up to a serious challenge." He also told his