US displayed its nuclear power in World War II forcing USSR to build a secret city that stayed off the maps for decades!

Operation On

The Soviet Union did not want to lag behind the United States on any front. The southern Ural mountains were going to be the venue where USSR was going to construct a plutonium-production complex. Russia’s Mayak Chemical Combine had taken up the command of operating the military-industrial community. So what was the secret city going to be called? It’s Chelyabinsk-40.