An undated file photo from the Arizona Department of Corrections shows inmate Joseph Rudolph Wood, who was executed Wednesday. After the lethal injection process began, Wood reportedly remained alive for nearly two hours. AP hide caption

itoggle caption AP

Joseph Paul Franklin in a photo taken in 2012 by the Missouri Department of Corrections. /Reuters /Landov hide caption

itoggle caption /Reuters /Landov

Chinese police show a group of convicts at a sentencing rally in the city of Wenzhou on April 7, 2004. Eleven prisoners were later executed for various crimes. Since then, the number of executions in China has significantly declined. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images