Laura Sullivan, investigative correspondent, NPR
Walter Dickey, professor, University of Wisconsin Law School
George Welborn, first warden at Tamms Correctional Center in Illinois
A lawsuit alleges severe abuse of federal prisoners at ADX-Florence in Colorado, what's known as a supermax facility where many inmates are housed in solitary confinement for 23 hours a day. It charges the government violates the Eighth Amendment's prohibition of cruel and unusual punishment.