To my anonymous downmodder: the parent's text seemed to think it impressive that B-52s fly at a height where "even a 10-second straight vertical fall should not be a problem".

Basic physics shows that such a height is scarcely more than about 500m, the distance an object in freefall would fall in that time and whatever other distance would be traveled during deceleration.

What, exactly, is the justification for downmodding a comment pointing that out?