A fireman walks amongst the rubble and the smoldering wreckage of the World Trade Center in New York in the wake of the Sept. 11, 2001, attacks. Gary Friedman/AFP/Getty Images hide caption

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Former Secretary of State Colin Powell, during an address in Washington, D.C., on March 1, 2010. Jim Watson /AFP/Getty Images hide caption

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Sept. 11, 2001: A surveillance camera image of two men identified by authorities as Mohammed Atta (R) and Abdulaziz Alomari (C) at the Portland International Jetport. Getty Images hide caption

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