Peter Sattler says he's "always been attracted to small stories about big things."
That's why Sattler devised "Camp X-Ray," a two-character drama about a guard and a detainee in Guantanamo Bay.
Sattler, who wrote and directed the film that debuted Friday in the U.S. Dramatic competition of the 2014 Sundance Film Festival, was inspired by a scene in a documentary about Guantanamo -- which showed a detainee peppering a guard with questions about the books on a library cart.
A version of that scene is played out by the film's two leads, a green soldier named Amy (played by Kristen Stewart) and a detainee, Alim (played by Payman Maadi, star of the Iranian drama "A Separation").