1) President Kennedy issued executive actions in 1961-1963 seeking access to classified UFO files, culminating in a confrontation with the CIA and MJ-12 project over releasing files.
2) In September 1963, Kennedy proposed joint US-USSR space missions, hoping this would lead to greater sharing of classified UFO information between countries.
3) After initially refusing, Soviet leader Khrushchev agreed to cooperate in early November 1963, leading Kennedy to issue memorandums on November 12th instructing cooperation with the USSR on space projects and reviewing UFO files for declassification.