Remarque: Airport Gothic is the first american copy of Futura.

Interesting -- Airport presumably was futuristic?
I can't spot any differences from Futura bold cond. Did I miss something?
Monotype seems to have been no slouch in the clone and rename game.
Don

20th Century (Monotype)
Spartan (Linotype)

I remember those.
Differences were trivial.
Don