Russian President Vladimir Putin conducted significant nuclear drills simulating a retaliatory strike, emphasizing modernization efforts and military readiness amid growing tensions over Ukraine. The exercises included launches of ballistic and cruise missiles, with specific warnings to NATO and the U.S. as Russia revises its nuclear doctrine to allow nuclear weapons use in response to conventional attacks supported by nuclear powers. This follows a series of similar maneuvers, highlighting Moscow's strategy to deter support for Ukraine from Western allies.