Who is behind the attack in Benghazi?

Federal agents and prosecutors investigating the attack on the U.S. diplomatic compound in Benghazi have filed charges against Ahmed Khattalah, leader of a Libyan militia that officials believe was involved in the assault, people briefed on the investigation said.

Reporter's Notebook: Arwa Damon returns to Benghazi

The charges under seal are the first criminal counts to emerge from the probe.

First criminal charges filed in Benghazi attack probe

CNN's Arwa Damon returned to Libya recently and spoke to Khattalah.