[Jan_Sobieski]

Strange that NASA spoliated all the designs and data from the Apollo missions. Perhaps we’d be back to the moon in the last 50 years…

[Campion]

They didn't though. And all of the hardware exists in museums and could be reverse-engineered if we wanted to. Most of the blueprints exist, too, but aren't very useful inputs to a modern, computerized, manufacturing process. The tooling and other purpose-built manufacturing equipment does not, however.

There are even extra F-1 (Saturn V first stage) engines sitting in a warehouse. A team reverse-engineered one of them -- their story is on the Internet, read it yourself -- and designed an upgraded F-1 that would have been much cheaper to manufacture, using modern methods, than the original F-1 was, at only a small cost in thrust/efficiency. It was proposed as the booster engine for the SLS.

NASA rejected it in favor of the "killed seven people on Challenger" solid-fuel booster rockets. [shrug]