As of January 2017, the Federation of American Scientists estimated that Russia has approximately 1,765 deployed strategic warheads, and another 2,700 non-deployed strategic and deployed and non-deployed tactical warheads, plus an additional 2,510 warheads awaiting dismantlement. Russia's nuclear warheads are deployed in four areas:
1. Land-based immobile (silos), like R-36 and its replacement RS-28 Sarmat.
2. Land-based mobile, like RT-2PM2 Topol-M and new RS-24 Yars.
3. Submarine based, like R-29RMU2 Layner and RSM-56 Bulava.
4. Air-launched warheads of the Russian Air Forces' Long Range Aviation Command
The military doctrine of Russia sees NATO expansion as one of the threats for the Russian Federation and reserves the right to use nuclear weapons in response to a conventional aggression that can endanger the existence of the state. Russia has developed the new RT-2PM2 Topol-M (SS-27) missiles that a Russian general claimed to be able to penetrate any missile defence, including the planned U.S. National Missile Defence.
