Hint...
"Their founding document [the Weather Underground's] called for the establishment of a "white fighting force" to be allied with the "Black Liberation Movement" and other "anti-colonial" movements[1] to achieve "the destruction of US imperialism and the achievement of a classless world: world communism."..."-Berger, Dan (2006). Outlaws of America: The Weather Underground and the Politics of Solidarity. AK Press, 95.
http://en.wikipedia.org/wiki/Weatherman_Underground#cite_ref-Berger_0-0
Outlaws of America: The Weather Underground and the Politics of Solidarity (Paperback) by Dan Berger
http://www.amazon.com/Outlaws-America-Underground-Politics-Solidarity/dp/1904859410