After two bankruptcies and a failed federal bailout, Spirit Airlines is out of moves. The ultra-low-cost airline announced early on Saturday that it is shutting down and ceasing operations immediately. "All Spirit flights are cancelled and customer service is no longer available," the airline said on its website. It said customers booked on flights should not go to the airport. Directing travelers to links offering advice and information, it said: "Thank you for choosing Spirit — we are