FILE - In this Tuesday, April 15, 2008 file photo, Terry Crenshaw, warden's assistant at the Oklahoma State Penitentiary, walks past a gurney in the execution chamber in McAlester, Okla. At right are ... more 
FILE - In this Tuesday, April 15, 2008 file photo, Terry Crenshaw, warden's assistant at the Oklahoma State Penitentiary, walks past a gurney in the execution chamber in McAlester, Okla. At right are rows of chairs for witnesses. A lawsuit filed on behalf of 21 Oklahoma death row inmates on Wednesday, June 25, 2014, seeks to halt any attempt to execute them using the state's current lethal injection protocols, which it claims presents a risk of severe pain and suffering. (AP Photo) less 
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Associated Press
Wed, Jun 25, 2014 6:06 PM EDT