Founded in 1961 to work for nuclear disarmament, Women Strike for Peace (WSP) began to protest the Vietnam War in 1963. Identifying themselves as "concerned housewives" and mothers, members mobilized around the slogan "Not Our Sons, Not Your Sons, Not Their Sons." In February 1967, WSP held the first antiwar protest at the Pentagon. More than 2,000 women, some shown here, banged their shoes on Pentagon doors, which were locked as they approached. © Bettmann/Corbis.