戦略兵器制限交渉
At the start of the Nixon administration, Smith was appointed director of the Arms Control and Disarmament Agency (ACDA). He led the U.S. negotiating team during the Strategic Arms Limitation Talks (SALT) with the Soviet Union which resulted in the Antiballistic Missile (ABM) Treaty of 1972. Smith was North American Chairman of the Trilateral Commission from 1973 to 1977.