Russia’s latest ‘Sarmat’ missile test and Vladimir Putin’s warning about building an “unstoppable” nuclear force are fueling fresh global tensions. Kremlin spokesperson Dmitri Peskov says Moscow has not received any official U.S. reaction after the hypersonic-capable missile launch. As Donald Trump lands in China for key talks with Xi Jinping, Russia is signaling confidence in its expanding strategic arsenal and hinting at future economic cooperation with Washington. The developments come amid the Ukraine war, NATO concerns, and growing fears of a renewed nuclear arms race between global powers.