They didn’t attempt any rescue because that would have brought more attention to what was a HUGE, BLOWN ARMS-SMUGGLING SCANDAL.
It was “cleaner” just to turn away and hope all 45 DIED over the course of the attack.
This was one of those super sensitive JSOC things, and if they pull the plug, then all the players know there’s a very good chance they’re all on their own —they know it when they sign up for this spooky stuff.
Playa went to bed hoping they’d quietly all DIE.
Then without survivors we could have bombed anyone in response and the media would have cowed the Romney campaign even more into not asking any difficult questions.