Two officers with the Raleigh County Sheriff's Office stand guard in front of the Upper Big Branch coal mine several days after the April 5, 2010, explosion that killed 29 workers in Montcoal, W.Va. Mark Wilson/Getty Images hide caption

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A group of detainees kneels during an early-morning Islamic prayer in their camp at the U.S. military prison for "enemy combatants" in 2009 in Guantanamo Bay, Cuba. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images