The ship began moving again Tuesday night after the first of several Mexican tugboats en route to the stricken liner began pulling it toward San Diego, where it was expected to arrive Thursday night, Carnival Cruise Lines said in a statement.U.S. Navy helicopters were ferrying 70,000 pounds of supplies, including the crab meat, croissants, Pop Tarts, Spam and other items, to the ship.The Seahawk h