Captives separated by a fence conduct communal evening prayers at the Camp 6 prison building at the U.S. Naval Base at Guantanamo Bay, Cuba. Walter Michot/Miami Herald/TNS/Landov hide caption

itoggle caption Walter Michot/Miami Herald/TNS/Landov

Brian Hopson, assistant superintendent at Alameda County Juvenile Hall, stands in one of its many empty units. The 360-bed facility was full when it opened eight years ago, but is now at half capacity. Brett Myers/Youth Radio hide caption

itoggle caption Brett Myers/Youth Radio

Dana Bowerman's lifelong best friend Michelle Elliott holds a photograph of the two together. Bowerman is serving a nearly 20-year sentence for federal drug conspiracy charges. She was holding out hope for clemency for nonviolent drug offenders but it is unlikely that she will receive an early release date. Matthew Ozug/NPR hide caption

itoggle caption Matthew Ozug/NPR

Comedian Ari Shaffir performs at the 2015 Bonnaroo Music and Arts Festival in June in Manchester, Tenn. Shaffir has said fellow comedian Carlos Mencia stole his joke about who would build a fence on the U.S.-Mexican border. Copyright on jokes is difficult to prove, and it turned out two other comedians had made similar jokes as well. John Davisson/Invision/AP hide caption

itoggle caption John Davisson/Invision/AP