Saw a document on this "organization". Quite interesting...on the 1960-70´s USA and anti-Vietnam war movements.

"Hello, I'm going to read a declaration of a state of war...within the next 14 days we will attack a symbol or institution of American injustice." ~ Bernardine Dohrn

http://www.upstatefilms.org/weather/main.html

Outraged by the Vietnam War and racism in America, the organization waged a low-level war against the U.S. government through much of the 1970s, bombing the Capitol building, breaking Timothy Leary out of prison, and evading one of the largest FBI manhunts in history.

http://www.filmthreat.com/Reviews.asp?Id=3811

Their goal was overthrowing the U.S government by any means necessary.

It’s unfortunate that the Weathermen chose to engage in terrorism, because while their words still have the ring of absolute moral truth, their violent actions not only brought down the full wrath of President Richard “Law and Order” Nixon, but ended up forcing all these young people into hiding, where their voices could no longer be heard and the shame of their actions made them look like rank cowards. To Nixon, these scruffy little longhairs were a godsend, an embodiment of the antiwar left in one neat package.
---------

In the early 1970s, the group, operating in cells across the country, claimed up to 300 members, and planted over two dozen pipe bombs. They bombed the Pentagon, the US Capitol, NYPD HQ, the New York Board of Corrections (after Attica), and the offices of companies invested in Chile and Puerto Rico. The gruesome lesson of the Townhouse explosion ensured they always struck at night, in empty offices, and gave detailed advance bomb-warnings. They never killed anyone.

http://www.upstatefilms.org/weather/guardian.html

By 1980, almost all had turned themselves in. Nobody except Gilbert (for a later crime unrelated to the Weathermen) did any time, aided by the fact that the FBI had broken so many laws in pursuing them!

__________________