[JumpCrisscross]

> I'd still count the Mir space station (1985) and Buran space shuttle (1988) to both be ambitious achievements

Mir yes. Buran was an ambitious project but not achievement.

[T-A]

I would rate this as an achievement:

https://en.wikipedia.org/wiki/Buran_(spacecraft)#Orbital_fli...

[JumpCrisscross]

Fair enough. If the Saturn V is an achievement so was Buran.