 One important effect of Sentinel construction, he thought, would be to encourage the Soviet Union to enter arms control talks with the U.S.Indeed, before Clifford left office, the Johnson administration made arrangements for negotiations that eventually led to the Anti-Ballistic Missile Treaty of 1972.Clifford continued McNamara's highly publicized Cost Reduction Program, announcing that over $1.2 billion had been saved in fiscal year (FY) 1968 as a result of the effort.