Yippie leader Abbie Hoffman and rock singer Grace Slick, stand outside the White House fence after they were turned away from a ladies' tea for Finch College Alumnae which Tricia Nixon was hosting in Washington, April 25, 1970. Hoffman was to be Miss Slick's “bodyguard” but not being a Finch alumna neither of them were able to chat with the president's daughter. (Photo by AP Photo)
