My memories of watching the Star Trek episode "Assignment: Earth" when it was in reruns in the 1970s include the incredibly cute Teri Garr and also a laughable use of NASA stock footage for the nuclear missile test. My memory is that the stock footage used showed several different types of rocket, from the Saturn shown on the pad, to an Atlas in flight, and maybe something else.
I just rewatched this episode for the purpose of making screencaps of the different vehicles, and found that there were no different vehicles in the remastered version (OK, they used 3 different Saturns, but this is pretty minor compared to what I remember).
Is it documented anywhere that this change was made in the remastering process? My google searches on this topic turned up some references to discussions of this, but not the discussion themselves, and I could not find a list of remastering changes for this episode.