Why not have every passenger use the plane’s oxygen masks through the entire flight?
There’s a war coming.
It will be mask wearing people against non-mask wearing people. The mask wearing people will force the non-mask wearing people underground. .......
Oh yeah. ...you are right. ....sounds just like Islam. ...
Nope, not Islam, just the new world order. ....
Passenger oxygen is only sufficient to enable safe breathing to descend to 10,000 feet.