War_Conflict

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** FILE ** Under heavy guard: The Washington Navy Yard was closed to all but essential personnel on Tuesday, Sept. 17, 2013, the day after a gunman launched an attack that hit office workers in the cafeteria and in the hallways at the military installation. (Associated Press)

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Can you make an image like esteemed Civil War photographer Mathew Brady? There's a contest underway for those who believe they can. (Congressional Cemetery photograph)

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An Iraqi policeman stands guard outside the Sunni Al-Hassan Mosque in Basra, 340 miles (550 kilometers) southeast of Baghdad, Iraq, Tuesday, Sept. 17, 2013. Gunmen have shot dead over a dozen Sunnis in Iraq's Shiite-majority city of Basra over the past two weeks, following threats to retaliate against them for attacks on Shiites in other parts of Iraq, police and a Sunni community leader said. (AP Photo/ Nabil al-Jurani)

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Family and friends wait to greet staff of the Naval Sea Systems Command headquarters as they are bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, spraying gunfire on office workers in the cafeteria and in the hallways at the heavily secured military installation in the heart of the nation's capital, authorities said. (AP Photo/Jacquelyn Martin)

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Rep. Michelle Bachmann, Minnesota Republican

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Family and friends greet staff of the Naval Sea Systems Command headquarters after they were bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, spraying gunfire on office workers in the cafeteria and in the hallways at the heavily secured military installation in the heart of the nation's capital, authorities said. (AP Photo/Jacquelyn Martin)

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Family and friends greet staff of the Naval Sea Systems Command headquarters after they were bused from the Washington Navy Yard to Nationals Park, in Washington, Monday, Sept. 16, 2013. At least one gunman launched an attack inside the Washington Navy Yard, spraying gunfire on office workers in the cafeteria and in the hallways at the heavily secured military installation in the heart of the nation's capital, authorities said. (AP Photo/Jacquelyn Martin)

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This booking photo provided by the Fort Worth Police Department shows Aaron Alexis, arrested in September 2010, on suspicion of discharging a firearm in the city limits. The FBI has identified Alexis, 34, as the gunman in the Sept. 16, 2013 shooting rampage at at the Washington Navy Yard in Washington that left thirteen dead, including himself. (Associated Press/Fort Worth Police Department)