"Clinton testifies about the Benghazi attack during a House committee meeting in October 2015. ""I would imagine I have thought more about what happened than all of you put together,"" she said during the 11-hour hearing. ""I have lost more sleep than all of you put together. I have been wracking my brain about what more could have been done or should have been done."" Months earlier, Clinton had acknowledged a ""systemic breakdown"" as cited by an Accountability Review Board, and she said that her department was taking additional steps to increase security at U.S. diplomatic facilities."
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