Police presence beefed up at NY airports, WTC site

NEW YORK – Law enforcement agencies around the U.S. added security measures on Monday following Osama bin Laden's death, out of what one called "an abundance of caution."
In Los Angeles, police were stepping up intelligence monitoring, while New York was sending extra police to its subways, airports, bridges and the World Trade Center site itself.

The second tower of the World Trade Center bursts into flames after being hit by a hijacked airplane in New York in this September 11, 2001

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.
"This response is not based on a current threat, but out of an abundance of caution until we have the chance to learn more," the agency said.