Weatherman, known colloquially as the Weathermen and later the Weather Underground Organization, was a U.S. Radical Left group consisting of splintered-off members and leaders of the Students for a Democratic Society which formed on the campus on the University of Michigan in the 1960s. They took their name from a line from the Bob Dylan song ‘Subterranean Homesick Blues’ “You don’t need a weatherman to know which way the wind blows.” The group referred to itself as a revolutionary organization of men and women whose purpose was to carry out a series of attacks that would achieve the revolutionary overthrow of the Government of the United States.[citation needed] Their attacks were mostly bombings of government buildings, executed after calling in bomb-threats and making sure their target buildings were evacuated. The Weathermen imploded shortly after the U.S. withdrawal from Vietnam in 1973 and the conquest of South Vietnam by the communist North in 1975, which saw the general decline of the New Left, of which Weatherman had been a part. More…..

http://en.wikipedia.org/wiki/Weatherman_(organization)

http://www.fbi.gov/page2/jan04/weather012904.htm

http://www.bbc.co.uk/bbcfour/documentaries/storyville/weather-underground.shtml

The Weather Underground was a violent group. Any web page that the group maintains will have a certain bias. Make sure that you also look at newspaper articles from the late 60’s and early 70’s to get a more balanced picture.

Go to weather underground.com