Robert McNamara, Harold Brown

Secretary of Defense Robert S. McNamara testifies on behalf of the limited nuclear test ban treaty at a hearing before the Senate Foreign Relations Committee in Washington on August 13, 1963. He told the group the United States has nuclear warheads âäœin the tens of thousandsâä and that the treaty would preserve a nuclear lead over Russia. Seated beside the Secretary is Harold Brown, director of defense research and engineering. (AP Photo/Charles Gorry)