Heightened security in NY, LI after terror alert
Security is stepped up in NYC and on LI after U.S. officials said they were chasing a credible but unconfirmed al-Qaida threat to use a car bomb on bridges or tunnels in New York or Washington. (Sept. 9, 2011)
Amtrak Police K-9 Unit police officer Jose Gonzalez and his dog Lex, a yellow labrador trained to detect explosives, patrol streets and perimeter buildings near Penn Station. (Sept. 10, 2011)
An engineer from Local 94 welds a manhole shut outside of Two World Trade Center in preparation for the 10th anniversary of the September 11, 2001 terrorist attacks on September 9, 2011 in New York City.
Police keep watch at a check point near the World Trade Center site on September 9, 2011 in New York City.
Police search vehicles near the World Trade Center site on September 9, 2011 in New York City.
Port Authority police officers keep on eye on the PATH station at Ground Zero as they and other police agencies react to a possible terror threat. (Sept. 9, 2011)
NYPD officers stop and look into a vehicle on Trinity Place just south of the Ground Zero area as NYPD and other police agencies act on a possible terror threat. (September 9, 2011)