NEW YORK - JULY 01: A construction worker stands in front of the steel beams at the worksite of One World Trade Center at Ground Zero in lower Manhattan July 1, 2009 in New York City. A new report by the New York Police Department identifies vulnerabilities around some of the city's buildings, and recommends the installation of new security barriers to prevent car bombs as well as other measures. (Photo by Chris Hondros/Getty Images)
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