Air conditioners keep tents cool on a U.S. military base in Iraq. The tents have been treated with polyurethane foam to increase energy efficiency. Courtesy Steven Anderson hide caption

itoggle caption Courtesy Steven Anderson

Army Spc. Christopher B. Fishbeck of Buena Park, Calif., poses for a photo on a rooftop during his tour of duty in Iraq. Courtsey of Fishbeck's Family hide caption

itoggle caption Courtsey of Fishbeck's Family

Senate Minority Leader Mitch McConnell wants two suspected terrorists to be imprisoned at Guantanamo Bay instead of in his home state of Kentucky. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Iraqi refugees Waad Alwan (left) and Mohanad Hammadi (right) were arrested May 25 in Kentucky for allegedly conspiring to aid al-Qaida. If convicted on all charges, each could face life in prison. U.S. Marshals Service/AFP/Getty Images hide caption

itoggle caption U.S. Marshals Service/AFP/Getty Images

Supporters of cleric Muqtada al-Sadr march in front of two large Iraqi flags with the Arabic words "God is great," in the Sadr City district of Baghdad on Thursday. Tens of thousands of Sadr's followers rallied to demand the U.S. military leave Iraq at the end of the year. Hadi Mizban/AP hide caption

itoggle caption Hadi Mizban/AP

Blackwater security contractors are seen in a helicopter in Baghdad in 2007. The company changed its name to Xe in 2009, amid controversy surrounding the killing of 17 Iraqi civilians in 2007. Khalid Mohammed/AP hide caption

itoggle caption Khalid Mohammed/AP