** FILE ** This May 17, 1982 file photo Bill Ayers, a former member of the Weather Underground, walks with wife, Bernardine Dohrn, and their son, Zayd Dohrn, 4, outside Federal Court in New York. Democratic presidential hopeful, Sen. Barack Obama, was asked about Ayers, now a University of Illinois professor who was once part of the radical Weather Underground, as part of a discussion of his patriotism during the Democratic presidential debate Wednesday night, April 16, 2008, in Philadelphia. Obama suggested he barely knows Ayers and shouldn't be held accountable for anything Ayers said or did. (AP Photo/David Handschuh, File)