ABC---Terrorists could be casing NY-Philadelphia-D.C. rail corridor - ABC : ABC News reports that suspicious activity along the New York - Philadelphia - Washington rail corridor, along with the discovery of a concealed infrared electronic device on the tracks near a rail yard in Philadelphia, has triggered federal and regional investigations. While authorities say they do not want to unnecessarily scare commuters, they say the findings fit the pattern of terrorists casing the rail lines for a possible attack.
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