In a remote forest, a few kilometres from the Chernobyl power plant, the huge Duga-2 radar tower stands as relic of Soviet mismanagement. Video by Adrian Hartrick and Dominika Ozynska Follow BBC ...

Over a period of several years and 21 meetings with CIA case officers in Moscow, Adolf Tolkachev, an engineer overseeing a radar development lab at a Soviet state-run defense institute ...

During the Cold War, the US Army wanted to use this glacier to hide a nuclear base that could quickly strike the Soviet Union in ... NASA's latest penetrating radar technology.