Overview: As Denver air traffic controllers struggle to keep departures on schedule amid heavy snow in 1987, a DC-9 is delayed on the tarmac. When the crew is finally cleared for takeoff, the plane gets only 20 feet off the ground before banking sharply and slamming back down, killing 28 of the 82 people on board. Follow investigators as they uncover why Continental Airlines Flight 1713 crashed in bad weather while others safely took off. The discovery will change commercial flight, and the teams flying these aircraft, forever.