Two Delta Air Lines regional jets collided on the ground at LaGuardia Airport in New York, injuring a flight attendant, damaging a cockpit and tearing off part of a wing. The National Transportation Safety Board said Thursday that the collision happened the night before at the intersection of two taxiways. A wing of an aircraft preparing for takeoff to Roanoke, Virginia, hit the nose of an aircraft arriving from Charlotte, North Carolina. Air traffic control audio recorded a pilot as saying the wing also damaged the cockpit window. Authorities say the flight attendant was taken to a hospital with non life-threatening injuries.