Occasionally, aircraft take off or land on taxiways by mistake ... was a lack of standard phraseology and dense fog. A Boeing 747 (KLM Flight 4805) initiated its takeoff run and collided with ...

The disaster remains the worst aviation accident ever seen, and brought sweeping changes to the airline industry.

All passengers and crew members aboard the KLM plane lost their lives, while at least 330 people on the Pan Am plane died.