Traffic passes the Freedom Tower, under contruction, in New York on Monday, May 2, 2011. The Port Authority of New York and New Jersey said it will add more police at the facilities it runs, which ... more 
Traffic passes the Freedom Tower, under contruction, in New York on Monday, May 2, 2011. The Port Authority of New York and New Jersey said it will add more police at the facilities it runs, which include the airports, the George Washington Bridge and ground zero. The measures aren't response to any current threat and all the facilities will operate normally otherwise, the Port Authority said. less 
1 / 1
Associated Press | Photo By Mark Lennihan
Mon, May 2, 2011 10:15 AM EDT