A young man peers out a window in a holding cell after arriving at the intake unit at Alameda County Juvenile Hall. Brett Myers/Youth Radio hide caption

itoggle caption Brett Myers/Youth Radio

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