Russia has conducted drills with Yars mobile nuclear missile launchers, signaling a show of strength amid the Ukraine war. President Vladimir Putin warned the U.S.-led West, stating Russia could act if American missiles are deployed in Europe. The Russian defense industry is ready to produce intermediate and shorter-range missiles, previously banned under a defunct treaty with the U.S. These drills follow recent tactical nuclear exercises with Belarus, despite Putin's assertion that there is no immediate need to use nuclear weapons in Ukraine.