Why did she do this? She herself said it was NOT because of funding. Could it have been because to do so would go against the Obama campaigns narrative that AQ was on the run? Perhaps, and if so she was playing politics with the lives of those Americans. And the attempt to blame it on a video could have very well been the same thing.
We dont know, partially because the Obama administration threatened witnesses, and has not been forthcoming with providing the data surrounding the attack-the most transparent administration ever only releases this data when its threatened with litigation.