AdvertisementIn Stopping Cargo Bombs, U.S. Security System Worked, Napolitano Says06:06Download AudioResumeNovember 01, 2010Bill ChappellfacebookEmail"It's hard to imagine what we could have done differently or more quickly," says Homeland Security Secretary Janet Napolitano of last week's discovery of a plot to send bombs to the U.S. by cargo plane. (Getty Images North America)