Factbox-What is the chain of command for a potential Russian nuclear strike?

FILE PHOTO: Russian President Vladimir Putin speaks about putting nuclear deterrence forces on high alert, in this still image obtained from a video, in Moscow, Russia, February 27, 2022. Russian Pool/Reuters TV via REUTERS

(Reuters) - President Vladimir Putin has once again promoted Russia's nuclear might against the backdrop of the Ukraine conflict, saying on Wednesday that a new ballistic missile system should make Moscow's enemies stop and think.

Announcing Russia's invasion of Ukraine eight weeks ago, Putin warned the West that any attempt to get in its way "will lead you to such consequences that you have never encountered in your history". Days later, he ordered Russia's nuclear forces to be put on high alert.