I have read other reports of East Bloc Armor being transported by train around the U.S. to military bases for testing, evaluation, and training.
Tactical targets for the Goldwater Range.
Nothing more.
I also think the Scud is a mockup. The train loads of Soviet equipment in the 90s were probably captured Iraqi tanks and other Soviet/Chicom vehicles captured after the Gulf War. I remember driving home after work when I was assigned to Ft, Knox in 1974 of seeing a dozen or so flat cars with tarp covered tanks on one of the rail sidings on post. I didn’t think much of it until I got to a stop light and had time to look at the profile and the road wheels. that was when I realized that the tanks were T-62s.
BRDMs and all types of soviet armorment roam the desert hills and skys of Ft Irwin in Ca as OPFOR
Movie prop maybe?
Movie magic
Lot’s of fun soviet stuff for sale at the link from the article, including a WW2 German/austrian tugboat. I want one of their amphib vehicles.
http://sovietarmor.com/catalog/armored/brdm_2.html