The worse air disaster in history, Teneriffe, March 28, 1977, killed 583, an appaling death toll. Well, it was the Murphy Law tunned to 11. during the entire day that ended with the diaster, every single thing that could go wrong, went perfectly wrong, until the two 747s collided.
What is completely mind blowing is that both aircrafts were at Teneriffe island secondary airfield, which was a completely wrong place that deficiencies led straight to the carnage.
So why did so many airliners packed with thousands of passengers landed in that hell hole ?
Because, on the morning, a Teneriffe freedom liberation group (terrorists, but very minor ones, no al Quaeda nor Daesh, really) detonated a small bomb at the island main airfield. Nobody died in the blast - well, at least initially.
But the main airport was shut down, and all the airliners circling above, started piling up at the shitty secondary airport.
Soon the parking was crowded, so more and more airliners parked on the taxiway, the parallel track to the main runway. Soon the taxiway was blocked, so now all those waiting airliners started a very, very dangerous business.
They started rolling down the runway, slowly, then they either made a 180 degree turn at the end, and then took-off -after the control tower cleared the runway of whoever was rolling behind them !!!!
More exactly, they had to take the runway in reverse, to avoid the mass of airliners parked on the taxiway; then take a lateral exit toward the non-crowded part of the taxiway, and taxi as usual.
And then it went from bad to worse. Captain van Zaaten was KLM star pilot, a veteran, the company idol and also very competent. Dear van Zaaten was growing frustrated and impatient that afternoon: he had spent too much time in the cockpit, by the time he would reach Amsterdam, out of this fucking island, he would be flying too long. Plus all the fuel spent on the ground. and all those passengers growing impatient, some of them have already left the ship. Bad, bad bad.
Van Zaaten took his 747 on the runway, slowly taxiing it, took his exit as planned, then made his 180 turn, ready to lift-off... and waited. Waited. Waited again. The control tower was at lost: fog settled in (goddam fog) then the radio communications went shitty.
Meanwhile another 747, a Pan-Am, did the same: taxiing slowly on the runway, then getting out of the KLM way by the freakkin' side exit.
they entered the fog.
They missed the exit.
They said "we will get out at the next exit. Tell that to the control tower, and please, tell them to tell that to the fucking KLM."
The control tower tried to tell that to KLM.
And then, a fucking larsen (audio feedback, this thing -
https://en.wikipedia.org/wiki/Audio_feedback)
screwed their communications.
In fact the radio messages between KLM, Pan-Am and the tower, just cancelled together into a whistle. In fact the only thing from the tower message that was left was "Ok..." when the message contain was essentially "Ok, stand ready FOR lift-off, but do NO lift-off (for Christ sake !!)"
still KLM waited a little more... when all of sudden van Zaaten had enough and started rolling. alarmed, one of the crew members asked the crucial question
"Hey, wait, is it clear, the Pan Am plane ?"
(the rest is only horror)
...when the voice recorders where found amid the burning wreckage and passengers, van Zaaten answer was known. The accident report just says
"YEEAAAAAAH" (emphatically) "
(shut up and let me lift-off, silly stupid)
And boom went the two jumbos and their passengers, leaving sixty survivors in the Pan-Am, and zero in the KLM.
Now back to our Teneriffe freedom fighters that started the entire enchillada. Dear God, imagine their faces when they heard of the crash "our little bomb... killed 583 people" sure, dude. Worse than any terror attack, in the air or in the ground, or both, bar 9-11.