Italian police patrol the access to the rails at the Rebibbia subway station in Rome after a bomb scare on Tuesday, Dec. 21, 2010. A suspicious package full of wires and powder was found in a subway car, prompting a terror scare during the Christmas season. Bomb-disposal experts checked the powder and concluded that the device could not have exploded. (AP Photo/Angelo Carconi)

Photo by: Angelo Carconi

Italian police patrol the access to the rails at the Rebibbia subway station in Rome after a bomb scare on Tuesday, Dec. 21, 2010. A suspicious package full of wires and powder was found in a subway car, prompting a terror scare during the Christmas season. Bomb-disposal experts checked the powder and concluded that the device could not have exploded. (AP Photo/Angelo Carconi)