The New York Police Department is developing a plan to track and record every vehicle entering Manhattan. The proposal, known as Operation Sentinel, calls for 116 license plate readers and 3,000 closed-circuit cameras to be installed at every bridge and tunnel serving the island. Radiation detectors would also be used. Meanwhile, Homeland Security officials in the Washington, D.C. area are also planning to dramatically expand the use of automated license plate readers to track vehicles. The Associated Press reports officials from Maryland, Virginia and the District of Columbia have agreed to install 200 license plate readers on police vehicles, at airports and along roads.