Homeland Security Secretary Janet Napolitano and U.S. Sen. Mary Landrieu, right, joke around when students showed them a robot demonstration during their tour of Cyber Innovation Center on Tuesday, ... more 
Homeland Security Secretary Janet Napolitano and U.S. Sen. Mary Landrieu, right, joke around when students showed them a robot demonstration during their tour of Cyber Innovation Center on Tuesday, Aug. 9, 2011 in Shreveport, La. (AP Photo/The Shreveport Times, Henrietta Wildsmith) MANDATORY CREDIT less 
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Associated Press | Photo By The Shreveport Times, Henrietta Wildsmith
Tue, Aug 9, 2011 3:00 PM EDT