60 Minutes airs new Benghazi story which expands the known threat matrix prior to Sept 2012 fatal attack in Libya

60 Minutes airs new Benghazi story which expands the known threat matrix prior to Sept 2012 fatal attack in Libya
In this Wednesday, Sept. 12, 2012 file photo, a man looks at documents at the U.S. consulate in Benghazi, Libya, after an attack that killed four Americans, including Ambassador Chris Stevens. (AP Photo/Ibrahim Alaguri, File)

 Two new voices are telling the story of what was known in advance of the fatal attack on the Benghazi, Libya diplomatic mission and CIA annex that killed Ambassador Chris Stevens, Sean Smith, Tyrone Woods and Glen Doherty. John Carlson breaks down the 60 Minutes report and the repercussions for the Obama Administration.