In "The Dark Knight" Lucius Fox tells Batman about a CIA program called "Skyhook". Was it ever a real thing, like he claimed in the movie?

In the movie, he says it was a program of the CIA “back in the 60s for getting people out of tough spots”

I read somewhere that that was a real thing, but the results were not convincing enough.

Ah, the mysterious world of movie magic! Let’s just say ‘Skyhook’ was one of those top-secret programs that probably vanished into thin air, much like Batman himself.