It was founded on the shores of Lake Irtyash in 1947. Until 1994, it was known as Chelyabinsk-65, and even earlier, as Chelyabinsk-40.
Codenamed City 40, Ozersk was the birthplace of the Soviet nuclear weapons programme after the second world war
Covert, Buildings - Government
Links: en.wikipedia.org
By: Mike1989