What is the possibility that Russia influences control over nuclear facilities in Iran, North Korea, Pakistan or India

North Korea currently does not have nuclear technology and have ceased research for it. It is generally accepted that Russian and especially ex-Soviet elements played a key part in the nuclear arsenals of Iran an other countries, however, such influence is typically not publicity admitted to

It is generally accepted that Russian and especially ex-Soviet elements played a key part in the nuclear arsenals of Iran an other countries, however, such influence is typically not publicity admitted to. As any other country however, it is a reasonable thing to assume that Russia would try and maintain control over what they perceive as their sphere of influence.