And in fact one of the worst air disasters of all time was from a similar situation where a 747 taking off ran into another 747 that was still landing at least

And in fact one of the worst air disasters of all time was from a similar situation where a 747 taking off ran into another 747 that was still landing at least partially due to a communication breakdown and nonstandard phrasing between the planes and the ATC. 9/11 is the only air disaster with more casualties. https://en.wikipedia.org/wiki/Tenerife_airport_disaster#Communication_misunderstandings https://en.wikipedia.org/wiki/Tenerife_airport_disaster#Comm...