General Martin Dempsey, the chairman of the Joint Chiefs of Staff, appeared to be unaware that then-Secretary of State Hillary Clinton testified that she did not see a cable from Ambassador Christopher Stevens in August of 2012 in which the late ambassador warned the consulate in Benghazi was not safe from attack. Republican senator Lindsey Graham asked Dempsey about Clinton's testimony.

"When Secretary Clinton testified a few weeks ago that she had a clear-eyed assessment of the threat we faced in Libya, is that really a credible statement if she didn't know about the ambassador's cable on August 15, saying 'we can't defend this place'?" Graham asked.

"Well, I didn't know she didn't know about the cable," Dempsey replied.

"She said she didn't," Graham responded. "Are you stunned that she didn't?"

"I would call myself surprised that she didn't," Dempsey said. Watch the video below:

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