Dominick Reuter | AFP | Getty Images A Southwest Airlines jet sits on the runway at Philadelphia International Airport a...

NTSB | Reuters U.S. NTSB investigators are on scene examining damage to the engine of the Southwest Airlines plane in th...

Robert Alexander | Getty Images Southwest Airlines passenger aircraft parked at their gates at McCarran International Ai...

A United Airlines airplane passes the skyline of lower Manhattan and One World Trade Center as it heads to a runway at N...