A sight like that will never be seen again.
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Mainly because this country would not stand for the 80,000 dead airmen today.
High casualties certainly aren’t something that gets popular support. But what I had in mind is the change in technology. You could drop the same tonnage with far fewer planes after WWII. A number that gets reduced even further with the use of ballistic missiles, drones, cruise missiles. No need for enough airplanes to fill the sky.