Tenerife airport disaster
This was a fatal runway disaster in March 1977 between two Boeing 747 planes at Tenerife North Airport. Killing five hundred and eighty three people, this is the deadliest accident in the history of aviation. It occurred when a bomb explosion at Gran Canaria Airport caused many aircrafts to be diverted to Los Rodeos Airport. Air traffic controllers at Los Rodeos were forced to park many airports on the taxiway thus blocking it. To make matters more complicated, thick fog developed. The two 747s were required on the runway to takeoff when Gran Canaria reopened. Neither aircraft could see each other and the runway controller could not see them. Both planes tried to takeoff at the same time and the resulting collision killed all the passengers onboard.