Transportation Security Administration(TSA) officers wait for ceremonies to begin wearing the new dark blue TSA uniform shirt and new badge, at the Checkpoint Evolution prototype at Baltimore-Washington International Airport’s security screening checkpoint B in the Southwest terminal on April 28, 2008 in Linthicum,Maryland. The Department of Homeland Security unveiled a Checkpoint Evolution prototype that went into service today at the airport. AFP Photo/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)

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