Cabin manager Lee Yoon-h was the last person to exit the plane and helped evacuate passengers despite breaking her tail bone in the crash. Other attendants hacked apart an inflatable slide that deployed inside the aircraft, blocking an exit.
Lastly, experts told ABC News, improved onboard computers have done the most to advance aircraft safety.
It is very likely, experts said, that the pilot training on the 777 had disabled the plane's autopilot in order to best learn to manually fly the aircraft.
"The most significant improvements to safety are the computers in the cockpit," Gaynard said. "Had the pilot engaged the auto-throttle, had he pushed one button, things could have been much different."