JFK Kennedy was the 35th president of the United States, serving from 1961 until his assassination in 1963. He was the youngest person elected president. Kennedy served at the height of the Cold War, and the majority of his foreign policy concerned relations with the Soviet Union and Cuba. He signed the first nuclear weapons treaty in 1963, signed the Peace Corps, Alliance for Progress with Latin America and the continuation of the Apollo program with the goal of landing a man on the Moon before 1970.