Sergey Kiriyenko said that it is a question nowadays how to use the system and potential of the ten closed cities in the development of nuclear industry. According to Kiriyenko, each city is to choose its own way in the future, either to shift gradually to the civil production and “open doors for business”, while the other cities like the Russian nuclear centres “would be closed forever and work for the defence capacity of Russia”, ITAR-TASS reported.