I used to be an arms control inspector. In the late 90's I inspected the Barrikady Machine Building Plant under the provisions of the INF Treaty. There were 120 buildings inside the 1x4 km area and I and my nine team members inspected every one. I personally walked through all of the major halls and foundry buildings. They were actively machining large caliber gun barrels at the time.
Walked all over the Mamaev Kurgan. Drove past Pavlov's House. Went down to the bank of the Volga. Many memories