Low-cost Spirit Airlines announced early Saturday that it would shut down its operations immediately after 34 years in business, leaving thousands of passengers scrambling to rebook their travel on other airlines. The company, which operated hundreds of daily flights across the U.S. and employed 17,000 people, had been in discussions with the Trump administration about a $500m rescue package, but no deal was reached. But the effort has stalled because Spirit has been unable to secure the