I'm sure Obama didn't want to be there. He'd been in a NATO briefing on Turkey/Syria all day and then a couple hours after he finishes he has to go debate Mitt. All on his wedding anniversary.
Fact checks are not coming in favorably for Governor Romney. Think Progress is hardly impartial, but they have a well formatted article here:
http://thinkprogress.org/politics/20...in-38-minutes/