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A picture shows the damage inside the burnt US consulate building in Benghazi on September 13, 2012, following an attack on the building late on September 11 in which the US ambassador to Libya and three other US nationals were killed. Libya said it has made arrests and opened a probe into the attack, amid speculation that Al-Qaeda rather than a frenzied mob was to blame. AFP PHOTO/GIANLUIGI GUERCIA        (Photo credit should read GIANLUIGI GUERCIA/AFP/GettyImages)
A picture shows the damage inside the burnt US consulate building in Benghazi on September 13, 2012, following an attack on the building late on September 11 in which the US ambassador to Libya and three other US nationals were killed. Libya said it has made arrests and opened a probe into the attack, amid speculation that Al-Qaeda rather than a frenzied mob was to blame. AFP PHOTO/GIANLUIGI GUERCIA        (Photo credit should read GIANLUIGI GUERCIA/AFP/GettyImages)

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    '60 Minutes' returns to Benghazi

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'60 Minutes' returns to Benghazi

Ryan Lizza, Eli Lake & David Folkenflik discuss the CBS report that asks new questions about the Libyan embassy attack.

'60 Minutes' returns to Benghazi

Ryan Lizza, Eli Lake & David Folkenflik discuss the CBS report that asks new questions about the Libyan embassy attack.