ETOPS Aviation on Instagram: "On March 27, 1977, the world’s deadliest aviation accident occurred at Los Rodeos Airport in Tenerife, when two Boeing 747s—KLM Flight 4805 and Pan Am Flight 1736—collided on the runway in heavy fog. Both aircraft had been diverted there after a bomb threat at Las Palmas forced dozens of flights into the small airport, creating congestion and forcing planes to taxi on the runway. Poor visibility, ambiguous radio communications, and blocked transmissions added to the