Putin threats: How many nuclear weapons does Russia have?

President Putin has announced a "partial mobilisation" of forces to be sent to Ukraine and warned that he will use "all means we have" to defend Russian territory, raising concerns around the world.

But as with previous warnings, analysts suggest his actions should probably be interpreted as a warning to other countries not to escalate their involvement in Ukraine, rather than signalling any desire to use nuclear weapons.

Nuclear weapons have existed for almost 80 years and many countries see them as a deterrent that continues to guarantee their national security.