About Post-9/11, biggest terror threat is underground (AP)

AP - It's the morning rush in the Times Square subway station, a routine convergence of humanity and mass transit that makes New York City hum. Mixing seamlessly with subway riders are New York Police Department officers with heavy body armor and high-powered rifles, commanders in blue NYPD polo shirts carrying smart phone-size radiation detectors and a panting police dog named Sabu.




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