Two years after Benghazi, questions remain

(CNN) – This Thursday marks 13 years since the 9/11 attacks. But it will also mark two years since the terrorist attack on U.S. government posts – one diplomatic, one CIA - in Benghazi, Libya.

The fog of war of that horrible night has been further blackened by political finger-pointing here in Washington. But there are facts that remain irrefutable: four Americans died in Benghazi.

Now, the surviving CIA contractors that fought to save those in harms' way are talking, and they say more could have been done.

CNN's Jake Tapper reports.