Two men sit inside the chapel at Halden prison in far southeast Norway in this picture taken in 2010. Prisoners here spend 12 hours a day in their cells, compared to many U.S. prisons where inmates spend all but one hour in their cell. STR/Reuters/Landov hide caption

itoggle caption STR/Reuters/Landov

Latandra Ellington, 36, was serving time for tax fraud at Lowell Correctional Institution when she died. Florida Department of Corrections hide caption

itoggle caption Florida Department of Corrections

An inmate walks through the yard at the North Central Correctional Institution in Marion, Ohio, which recently switched to private management. Ty Wright/Bloomberg via Getty Images hide caption

itoggle caption Ty Wright/Bloomberg via Getty Images

An inmate walks through the yard at the North Central Correctional Institution in Marion, Ohio, which recently switched to private management. Ty Wright/Bloomberg via Getty Images hide caption

itoggle caption Ty Wright/Bloomberg via Getty Images

Girls line up at the Bernalillo County Juvenile Detention and Youth Services Center in Albuquerque, N.M. Jenny Gold/NPR hide caption

itoggle caption Jenny Gold/NPR