The concept of “mutual aerial observation” initially proposed to Soviet Premier Nikolai Bulganin at the Geneva Conference of 1955 by U.S. President Dwight D. Eisenhower, was promptly rejected by the USSR and lay dormant for several years.

The treaty was eventually signed as an initiative of U.S. president (and former Central Intelligence Agency DirectorGeorge H. W. Bush in 1989.

Negotiated by members of NATO and the Warsaw Pact, the agreement was signed in Helsinki Finland on March 24, 1992.

Source: Wikipedia