there was an emergency landing in philadelphia. you can see firefighters waiting there, dousing the tarmac with foam. tonight, the ntsb is now on the scene investigating the first deadly accident involving a domestic airline in nearly a decade. abc's linzie janis leads us off abc's linzie janis in philadelphia. >> reporter: the in-flight terror began just minutes after takeoff. >> number one engine failure. >> reporter: southwest flight 1380, carrying 144 passengers and five crew, was headed from new york's laguardia for dallas when it abruptly diverted to philadelphia. the cabin losing pressure. masks dropping from the ceiling. terrified passengers bracing. >> we've got injured passengers. >> injured passengers, okay. and are you -- is your airplane physically on fire? >> no, it's not on fire, but part of it's missing. >> reporter: you can see the left engine mangled. a window in the 14th row blown out, where jennifer reardon, a mother of two, was sitting. multiple passengers telling us, she was nearly sucked out of the plane.