Which US president signed the Limited Test Ban Treaty in 1963?

US President John F. Kennedy signed the Limited Test Ban Treaty in 1963. He signed it for the United States in Moscow on August 5, alongside representatives of the Soviet Union and the United Kingdom.

The agreement emerged during a tense period of the Cold War, after atmospheric nuclear tests had spread radioactive fallout and intensified public pressure for arms control. The 1962 Cuban Missile Crisis also persuaded Kennedy and Soviet leader Nikita Khrushchev that improved communication and limited cooperation were essential to reducing the danger of nuclear war.

The treaty banned nuclear tests in the atmosphere, outer space, and underwater, but it did not prohibit underground explosions. It became one of Kennedy’s most important arms-control achievements and was ratified by the US Senate before entering into force on October 10, 1963.

The other presidents in the choices are easy chronological traps. Dwight Eisenhower left office in January 1961, Richard Nixon did not become president until 1969, and Lyndon B. Johnson succeeded Kennedy after his assassination in November 1963.