S4E8: Focused on Failure

Just minutes before touching down in Portland International Airport, all four engines of a DC-8 mysteriously flame out. With the aircraft dropping 3,000 feet per minute, the pilots realize they have no option but to crash land in the middle of a major American city. Witness the harrowing emergency landing of United Airlines Flight 173 in Portland, Oregon, and uncover the shocking reasons for its massive engine failure.