The U.S. death penalty system is under new scrutiny today after yet another botched execution. On Wednesday, Arizona took just under two hours to kill Jospeh Wood, sentenced to death for a double murder. Wood gasped for air, choked and snorted after he was injected with a two-drug combination that was relatively untested and had been used only once before, a 26-minute execution in Ohio earlier this year. Wood was killed after the Supreme Court overturned a lower court ruling that put the execution on hold. The Ninth U.S. Circuit Court of Appeals had sided with Wood’s request that Arizona disclose its lethal injection methods and the source of the drugs involved. Wood’s execution was the fifth since the botched killing of Oklahoma prisoner Clayton Lockett in April. In a statement, the American Civil Liberties Union said: “In its rush to put Mr. Wood to death in secret, Arizona ignored the dire and clear warnings from the botched executions of Oklahoma and Ohio. It’s time for Arizona and the other states still using lethal injection to admit that this experiment with unreliable drugs is a failure.”