Passengers walk in a train station in New York Oct. 6, 2005. New York City subway might be the target of a terrorist attack, and the city's police have taken additional measures to ensure the safety of the subway system and New Yorkers, said New York Mayor Michael Bloomberg Thursday. (Xinhua photo)
Passengers walk in a train station in New York Oct. 6, 2005. New York City subway might be the target of a terrorist attack, and the city's police have taken additional measures to ensure the safety of the subway system and New Yorkers, said New York Mayor Michael Bloomberg Thursday. (Xinhua photo)