Al Qaeda operatives may be plotting several unrelated attacks in the United States, targeting not only major cities but also remote bulwarks of the “critical infrastructure” in an effort to cause mass casualties and major economic damage throughout the nation, U.S. officials said Monday. Senior U.S. counter-terrorism officials said they have been unable to nail down specifics about a time or place for any potential attacks, despite a mad scramble to do so since receiving an alarming cache of corroborated intelligence beginning Thursday and Friday. Full Story