Travel security

A Once-Closed Russian Military Town In The Arctic Opens To The World

In Russia, there are closed cities that are so secret they're shut off from the world.
Soviet leader Josef Stalin built them during the Cold War, to give Russian military technology an edge. Some are devoted to building rockets or satellites for the space program. In others, researchers conduct top-secret chemical, biological or nuclear research.
They are known collectively by the acronym ZATO, which stands for "closed administrative-territorial formations."
Today, there are still dozens of these closed cities scattered across Russia. No foreigners are allowed to visit. Not even Russians can enter, unless they have a security clearance or special papers.