An estimated 1,710 of the warheads that can be used by the Russian military are deployed on the likes of intercontinental ballistic missiles or at strategic bomber bases, the organization said. The U.S. has approximately 1,670 deployed strategic warheads, according to the FAS.

The Ukraine war has not only shattered millions of lives and shaken Europe. It also has inured Washington to the use of nuclear threats as leverage.

Moscow will now consider a conventional attack on Russia by any nation supported by a nuclear power to be a joint attack, according to a change in the country's nuclear doctrine signed into law by Vladimir Putin.