In movies you may have seen many closed and secret cities with no connection with the outer world, but in reality such a city exists in Russia.
The walled city of Ozyorsk hosts 82,000 people a major portion consists of spies from Russian Intelligence to keep an eye on the citizens.
The reason for so much security of the city is that from the era of cold war Russia have kept its atomic bombs here. Most of the people of the city work in a plutonium mining in the area.
The health of the residents is widely affected by these radioactive materials. It is claimed in a documentary ‘City 40’ that most of the residents are suffering from cancer.