Just as the police cannot respond quickly enough to every crime, the US Military cannot scramble to every situation in a hostile world in time either. This is a sad thing that happened, but there is nothing that could be done.
There were special ops teams in Tripoli ready to go but were countermanded from scrambling.
'Those who think this will bring down the President deceive themselves. Guess that birther thing didn't pan out, eh?
non sequitur.