Over the last decade, the drugs used in lethal injection executions in the United States have fallen into short supply, as the mostly European companies that manufacture those drugs cut off their availability in protest of the death penalty. States are beginning to run out of stockpiles of pentobarbital and sodium thiopental. Instead, they're turning to combinations of what drugs are still available. The results could change the case on whether lethal injection represents cruel and unusual punishment. In Ohio last week, a prisoner took 25 minutes to die, struggling and gasping for breath all the while.