In this clip from The Oath, prisoner Salim Hamdan is shown on grainy video footage from a jail cell in Afghanistan in November 2001. Seventeen months later, Hamdan is imprisoned in Guantánamo and writes a letter to his brother-in-law.
In this chilling video, Pol Pot's second in command, Nuon Chea (a.k.a. "Brother Number 2"), describes the decision they made to eliminate perceived "traitors" while they were in power. It's the first time a leader of the Khmer Rouge has admitted to ordering the killing of Cambodian people.