In March of 1977, conditions at Spain’s Los Rodeos Airport were chaotic.
Due to a nearby terrorist incident at Gran Canaria Aiport, many flights were diverted to Los Rodeos. The airport quickly grew congested with parked airplanes blocking the only taxiway. This forced departing aircraft to taxi on the runway instead. Patches of thick fog drifted across the airfield, greatly reducing visibility for pilots and the control tower.