NEW YORK, NY - APRIL 23:  Monitors show imagery from security cameras seen at the Lower Manhattan Security Initiative on April 23, 2013 in New York City. At the counter-terrorism center, police and private security personel monitor more than 4,000 surveillance cameras and license plate readers mounted around the Financial District and surrounding parts of Lower Manhattan. Designed to identify potential threats it is modeled after London's "Ring of Steel" system.  (Photo by John Moore/Getty Images)