Bill Ayers planned to blow up a nail bomb at a Fort Dix dance, in order to kill American servicemen and their dates, but the bomb went off prematurely and killed his girlfriend and two other terrorists instead. Barack Obama later held a fundraiser in the terrorist’s living room.
David Axelrod said we were friendly, that was true; we served on a couple of boards together, that was true; he held a fundraiser in our living room, that was true; Michelle [Obama] and Bernardine were at the law firm together, that was true. Hyde Park in Chicago is a tiny neighborhood, so when he said I was “a guy around the neighborhood,” that was true.
Exclusive: Bill Ayers On the Weathermen, Obama’s Crap Job & More – The Daily Beast
Bill Ayers was hoping to do this to a large number of men and women at Fort Dix.

Obama was apparently very impressed with Ayers’ work, and chose to launch his political career at Ayers’ house.