Russian President Vladimir Putin has changed the terms of use of nuclear weapons.

The updated concept of nuclear deterrence says nukes can be used even if Russian targets are under threat of conventional weapons of the country's adversaries.

The use of nuclear weapons is still recognized as a "last resort" measure, seen solely as a "deterrent".

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However, among the conditions of possible use, there are cases of aggression where conventional weapons target Russia's critical objects.

In its nuclear deterrence efforts, Russia will look into the deployment by potential adversaries of hypersonic and laser weapons, missiles, and strike drones.