I can't tell if this is sarcasm or not but... yes, of course NASA developed reusable rockets. The space shuttle missions reused the shuttles and the boosters.
As far as I know no solid state boosters were ever re-used (how would that work?) - but then again SpaceX doesn't re-use solid state boosters either (because they do not use any)...
Things can be more complex and nuanced than quippy internet back and forth suggest. That's not even touching on the ship-of-theseus problem that is many former NASA engineers working at SpaceX these days.
https://en.wikipedia.org/wiki/Mars_sample-return_mission#NAS...
Like it's nice to finally have a firmer timeline for that, but damn, 10 years from now. A SpaceX employee gathering the sample tubes into his backpack in a couple years time to be returned on the next milk-run flight back to Earth is just so much cooler! :)
I think Elon was hoping for a manned mission to Mars in 2024 back in 2017 but his latest projection is 2026. He's certainly optimistic :)