#5. The military was not given authorization to intervene.
http://abcnews.go.com/Politics/OTUS/presidential-debate-full-transcript/story?id=17538888
OBAMA: ...Now with respect to Libya, as I indicated in the last debate, when we received that phone call, I immediately made sure that, number one, that we did everything we could to secure those Americans who were still in harm's way;
http://www.npr.org/2012/10/16/163050988/transcript-obama-romney-2nd-presidential-debate
PRESIDENT OBAMA: ...So as soon as we found out that the Benghazi consulate was being overrun, I was on the phone with my national security team, and I gave them three instructions.
http://www.state.gov/r/pa/prs/ps/2012/10/198791.htm
I neglected to mention from the top that that agent from the top of this incident, or the very beginning of this incident, has been on the phone. He had called the quick reaction security team, he had called the Libyan authorities, he had called the Embassy in Tripoli, and he had called Washington. He had them all going to ask for help.
Obozo failed to give cross border authorization?
Yes, I read about that concept long ago.
It is said, one of the military commanders was about to ignore the lack of authority and go ahead and deploy rescue effort. And is rumored to have been removed from command for it. (from what I have read, Obama Administration denies that happened)