A truckload of hippie anti-Vietnam War demonstrators arrives to join the estimated 60,000 people attending a rally in protest of the U.S. involvement in Vietnam at Kezar Stadium in San Francisco, Calif., on Aprl 15, 1967. (AP Photo)
A truckload of hippie anti-Vietnam War demonstrators arrives to join the estimated 60,000 people attending a rally in protest of the U.S. involvement in Vietnam at Kezar Stadium in San Francisco, Calif., on Aprl 15, 1967. (AP Photo)