[alnitak]

It is not true that nobody was hurt.

“In 1970 there were fatalities - a police officer died from his injuries after a pipe bomb was detonated in a San Francisco police station, while three of the group blew themselves up while building explosives in their New York apartment.”

http://news.bbc.co.uk/1/hi/world/americas/7653486.stm

[Lady GOP]

In the mid-1990s, Ayers and Dohrn hosted a meet-and-greet at their house to introduce Obama to their neighbors during his first run for the Illinois Senate. In 2001, Ayers contributed $200 to Obama's campaign. Ayers also served alongside Obama between December 1999 and December 2002 on the board of the not-for-profit Woods Fund of Chicago. That board met four times a year, and members would see each other at occasional dinners the group hosted.