On March 1, 1971 a bomb exploded in the Capitol building in Washington D.C. Members of the Weather Underground claimed responsibility for the terrorist act. The group claimed it was in protest of the government's involvement in the country of Laos. On May 19, 1972 a bomb went off in the Pentagon . The Weathermen said it was in celebration of Ho Chi Minh's birthday (a North Vietnamese communist revolutionary). On January 29, 1975 the Weathermen set off a bomb in the Department of State's building. The bombing was supposedly in protest of America's support for South Vietnam and Cambodia. On the same day another bomb was set to go off in a federal building in Oakland, California.