In his 2001 book about his Weatherman experiences , Bill Ayers stated his objection to describing the WUO as terrorist . Ayers wrote : " Terrorists terrorize , they kill innocent civilians , while we organized and agitated . Terrorists destroy randomly , while our actions bore , we hoped , the precise stamp of a cut diamond . Terrorists intimidate , while we aimed only to educate . No , we 're not terrorists . " Dan Berger , in his book about the Weatherman , '' Outlaws in America '' , asserts that the group " purposefully and successfully avoided injuring anyone ... Its war against property by definition means that the WUO was not a terrorist organization . " The late 1960s and early 1970s were tumultuous times , with the FBI attributing 1500 bombings in just 1972 to " civil unrest " by radical groups . The Weather Underground would claim responsibility for a total of about two dozen bombings . The observation that Weather Underground never attacked or harmed people , and only targeted property , is criticized by some who point to the bombs which caused the Greenwich Village townhouse explosion , which could have been used to harm people if they had n't exploded prematurely . Former Weather Underground member Mark Rudd , reminiscing in 2005 about that explosion , said : Prompted in part by claims made by informants working for the FBI within the Weather Underground , grand juries were convened in 2001 and 2009 to investigate if Weather Underground was responsible for the San Francisco Police Department Park Station bombing , in which one officer was fatally wounded , one maimed and eight more wounded by shrapnel from a pipe bomb . Ultimately , it was concluded that members of the Black Liberation Army , whom WUO members affiliated with while underground , were responsible for not only this action , but also the bombing of another police precinct in San Francisco , as well as bombing the Catholic Church funeral services of the police officer killed in the Park Precinct bombing in the early summer of 1970
Greenwich Village townhouse explosion
Greenwich Village townhouse explosion
Weather Underground