Side-by-side comparison: Zero Hour! (1957) Vs Airplane! (1980)

It may be hard to believe, but in the course of modern film, there are many instances of those taking earlier material and covertly making it into a "new" movie. I knew there was some overlap between AIRPLANE (1979) and ZERO HOUR (1957) but this lays it out in incredible order.

https://www.youtube.com/watch?v=8-v2BHNBVCs

And while we're here... DAVID LETTERMAN's unused SCREEN TEST for Airplane!

https://www.youtube.com/watch?v=tmLUFvu6x7c

And Barbara Billingsly on TALKING JIVE:

https://www.youtube.com/watch?v=gUw2fIa0dSI