[null and void]

And did it before the end of the decade.

Now the meme is that we can’t ever do it again, as we’ve lost the recipe...

[MichaelCorleone]

I don’t know if this is part of what you’re referring to, but supposedly the blueprints to the F1 engine that powered the booster part of the Saturn V were destroyed.

Supposedly they are gone forever.

I’d sooner buy the Brooklyn Bridge than believe that one.