In this undated file photo released by the Georgia Department of Corrections, death row inmate Roy Willard Blankenship is shown. The execution of Blankenship, who appeared to struggle last week, will be at the center of a push to stop lethal injections using a controversial new sedative, even though they may never be able to prove that it caused the spasms in his last moments. (AP Photo/Georgia Department of Corrections, File)