Russian President Vladimir Putin has initiated a strategic nuclear training exercise simulating a 'massive nuclear strike' in response to a potential adversary's first strike, emphasizing the readiness of Russia's nuclear forces amid ongoing geopolitical tensions, particularly due to the Ukraine conflict. The exercise involved the practical launch of ballistic and cruise missiles, including Yars intercontinental ballistic missiles and submarine-launched Sineva and Bulava missiles, showcasing Russia's defensive capabilities. Putin stated that nuclear deployment would only be an 'exceptional measure' for national security, while also rejecting the notion of engaging in a new arms race. Kremlin spokesperson Dmitry Peskov characterized the drills as routine, although they come at a time deemed critical in the escalating conflict with Ukraine. The exercise reflects changes in Russia's nuclear doctrine, which now considers any assault supported by a nuclear power as a joint attack. As Russia prepares for a prolonged confrontation, the drills underscore the heightened stakes in the current international climate.