tonight. this one, back here in the u.s. the passenger jet off a runway in florida, right into the water. much of the plane submerged in the river. and tonight, the new video here of passengers escaping onto the wing of the plane right in the middle of a storm. and this question now, why did the pilot switch runways at the last minute? abc's victor oquendo is on the scene in jacksonville. >> reporter: tonight, we're learning more about what led to these harrowing moments on the wing of that jetliner. >> it was the loudest bang i've ever heard in my life. baby coming through! baby coming through! >> reporter: darwing silva shot the video after he opened the emergency door. >> we got the women and children first onto the raft and then the firefighter pulled the raft to shore. >> reporter: the defense department chartered the boeing 747 coming from guantanamo bay. it slid off the naval air station runway in jacksonville friday night and into the water. >> biscayne 293, just walked to navy jax tower. he said both runways look pretty, pretty bad. >> reporter: there were storms in the area, and the ntsb is investigating why the pilots changed runways, switching their