NEW YORK, NY - APRIL 20: New York City Police Commissioner Raymond Kelly (C) discusses the new National Terrorism Advisory System as Congresswoman Rep. Carolyn Maloney (D-NY) (L) and Homeland ... more 
NEW YORK, NY - APRIL 20: New York City Police Commissioner Raymond Kelly (C) discusses the new National Terrorism Advisory System as Congresswoman Rep. Carolyn Maloney (D-NY) (L) and Homeland Security Secretary Janet Napolitano look on, on April 20, 2011 at Grand Central Station in New York City. The National Terrorism Advisory System (or the NTAS) replaces the color-coded Homeland Security Advisory System (HSAS) and will be fully implemented on April 26, 2011. (Photo by Michael Loccisano/Getty Images) less 
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Getty Images | Photo By Michael Loccisano / Getty Images
Wed, Apr 20, 2011 2:20 PM EDT