Benghazi attack : The Two-Way : NPR
According to this, they tried sending in troops, but there were no troops close enough to get there in time.
also:Officials say that U.S. forces from Europe and Fort Bragg in North Carolina were dispatched in an effort to help, but they arrived too late. Officials considered sending U.S. warplanes from Italy, but it was decided that dropping bombs would lead to civilian casualties.
Is not using the super secret CIA time machine an impeachable offense?The officials had little time to respond. There were no U.S. troops anywhere near the consulate, either in Libya or even in neighboring countries. So dozens of special operations forces and CIA guards from Tripoli were sent by aircraft to Benghazi, 480 miles to the east. They could not get there in time to help defend the consulate
(Normally, I don't like using NPR as a source here because it will be attacked. However, since the Daily Caller and WND are being used by the right these days....)