http://en.wikipedia.org/wiki/Sterling_hall_bombing1969 and 1970 were tense times in Madison. Antiwar protests occurred almost every day, and more often than not, (often provoked by the police) the became violent. If one walks down State Street in Madison, one will notice a store with no windows on the ground floor. The business (At that time, a drugstore, IIRC) got so sick of replacing broken windows on an almost daily basis, so the owner had all the windows bricked up.
David Fine Fine, Leo Burt, Dwight Armstrong, and Karl Armstrong formed a group called the New Year's Gang, a group determined to bring the war home. They attempted to bomb the nearby Badger munitions plant using a stolen single engine aircraft and mason jars full of ANFO, (Which failed due to poor aim and lack of detonators in the bombs) set fires at campus ROTC facilities, and tried to burn down the Selective Service headquarters. (the attempt failed miserably when they attacked the wrong building)
On 24 January, 1970, Karl Armstrogn, Dwight Armstrong, David Fine, and Leo Burt packed a stolen van full one ton of ANFO (The same explosives Timothy McVeigh and Terry Nichols would use against the Arther P. Murrah Federal Building 24 years later) and parked it outside Sterling Hall on the University of Wisconsin Campus. Sterling Hall was home to the Army Mathematics Research Center (AMRC) which had become extremely controversial at the time over allegations that the AMRC was working on projects directly related to the Vietnam War.
While the New Year's Gang set the van to explode in the wee hours to prevent human casualties, unbeknownst to them, a postdoctoral physics student Dr. Robert Fassnacht was working on experiments in the basement of Sterling Hall. he was found dead in his laboratory.
The Armstrong Brothers, Fine and Burt fled to Canada, The Armstongs, and Fine were caught, extradited and sent to prison, Burt remains at large to this day (Many speculate that Burt may have been some sort of
agent provocateurs)
Karl Armstrong served seven years and is now a Madison are restaurateur. Dave Armstrong served three years, and ended up driving taxis and serving a stint for meth trafficking before joining his brother in the restaurant business. He died of lung cancer a little over two months ago. Fine served three years and studied law in Oregon, but was denied admission to the Bar for his role in the bombing.
For more information on the Sterling Hall Bombing, and the events that led up to it, I recommend a great documentary called
The War at Home.