My gut feeling has always been that they were connected in NYC.
From the Columbia University website...
"Obama attended Columbia College from 1981 to 1983"
Source:
http://news.columbia.edu/home/1260
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Bill Ayers' education:
1987 - Ed.D, Columbia University, Curriculum & Instruction
1987 - M.Ed, Teachers College, Columbia University, Early Childhood Education
1984 [he completed degree in '84] - M.Ed, Bank Street College, Early Childhood Education
1968 - B.A., University of Michigan, American Studies
http://education.uic.edu/directory/faculty_info.cfm?netid=bayers
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Bank Street College
Where We Are and How to Get Here:
Bank Street College is located on the Upper West Side of Manhattan at 610 West 112th Street, between Broadway and Riverside Drive.
Bank Street College is located in a bustling family and university neighborhood four blocks from Columbia University
http://www.bankstreet.edu/aboutbsc/visiting.html
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Why Won’t Obama Talk About Columbia?
The years he won’t discuss may explain the Ayers tie he keeps lying about:
http://article.nationalreview.com/?q=NjY4YzdhMDBkZGQ3ZmU2MTUzYjdkMzc5ZjUzYmViZWM=
Initial connection probably in LA through black panthers and FMD referral. They may have paid for Occidental as well.
Hard to imagine, but Tom Ayers probably encouraged his son to bomb Americans, supported him while he did it, and then gave us this POS called Obama.