THR Director Peter Sattler, Kristen Stewart and the cast of Camp X-Ray reveal what it was like to shoot in a rundown prison. The actress also recalls bumping into Robert Redford at the festival. "He was like, 'how you doing?' And I shook his hand and he was like 'are you nervous?' and I was like, 'yeah, I'm sh--ting my pants,' and he was like, 'good it would be weird if you weren't.'"