The Federal Aviation Administration on Tuesday banned U.S. civilian flights to and from Haiti for 30 days after a Spirit Airlines airplane was struck by gunfire trying to land in Port-au-Prince a day earlier.The FAA's ban also prohibits U.S. flights from traveling under 10,000 feet in Haiti's airspace.On Monday, Spirit Airlines Flight 951 from Fort Lauderdale, Florida, diverted to Santiago in the Dominican Republic at around 11:30 a.m. after it was damaged by gunfire, the airline said. Spirit said one fligh ...