Photo taken on Dec. 15, 2015 shows a model of command center inside the counter-nuclear underground museum, shelter "Bunker-42", in Moscow, Russia. A real underground counter-nuclear shelter for a high Soviet military command was remade into a museum of the Cold War. The underground counter-nuclear shelter was designed with the capability to provide a month of independent and isolated life for the refugees, with a full control over USSR' army forces, including nuclear weapon. (Xinhua/Evgeny Sinitsyn)

Photo taken on Dec. 15, 2015 shows a model of Joseph Stalin sitting in the cabinet inside the counter-nuclear underground museum, shelter "Bunker-42", in Moscow, Russia. A real underground counter-nuclear shelter for a high Soviet military command was remade into a museum of the Cold War. The underground counter-nuclear shelter was designed with the capability to provide a month of independent and isolated life for the refugees, with a full control over USSR' army forces, including nuclear weapon. (Xinhua/Evgeny Sinitsyn)

People visit a conference hall inside the counter-nuclear underground museum, shelter "Bunker-42", in Moscow, Russia, on Dec. 15, 2015. A real underground counter-nuclear shelter for a high Soviet military command was remade into a museum of the Cold War. The underground counter-nuclear shelter was designed with the capability to provide a month of independent and isolated life for the refugees, with a full control over USSR' army forces, including nuclear weapon. (Xinhua/Evgeny Sinitsyn)

Visitors take photos of models of nuclear bombs inside the counter-nuclear underground museum, shelter "Bunker-42", in Moscow, Russia, on Dec. 15, 2015. A real underground counter-nuclear shelter for a high Soviet military command was remade into a museum of the Cold War. The underground counter-nuclear shelter was designed with the capability to provide a month of independent and isolated life for the refugees, with a full control over USSR' army forces, including nuclear weapon. (Xinhua/Evgeny Sinitsyn)

Photo taken on Dec. 15, 2015 shows a model of nuclear strike command center inside the counter-nuclear underground museum, shelter "Bunker-42", in Moscow, Russia. A real underground counter-nuclear shelter for a high Soviet military command was remade into a museum of the Cold War. The underground counter-nuclear shelter was designed with the capability to provide a month of independent and isolated life for the refugees, with a full control over USSR' army forces, including nuclear weapon. (Xinhua/Evgeny Sinitsyn)