Leaders of the radical American student group the Weathermen, (left to right) Jim Mellen, Peter Clapp, John Jacobs, Bill Ayers, and Terry Robbins (1946 - 1970), march at the van of a group of demonstrators during the 'Days of Rage' actions organized by the Weathermen to protest the trial of the Chicago Seven and 'to bring the war home.' (Photo by David Fenton/Getty Images)

Leaders of the radical American student group the Weathermen, (left to right) Jim Mellen, Peter Clapp, John Jacobs, Bill Ayers, and Terry Robbins (1946 - 1970), march at the van of a group of demonstrators during the 'Days of Rage' actions organized by the Weathermen to protest the trial of the Chicago Seven and 'to bring the war home.' (Photo by David Fenton/Getty Images)