U.S. President Donald Trump has confirmed the deployment of two nuclear submarines closer to Russia, calling it a necessary step to stay "prepared." The move follows provocative remarks by former Russian President Dmitry Medvedev. Trump issued an ultimatum to resolve the Ukraine war within 10 days or face tougher U.S. actions. Medvedev responded with warnings and references to Russia’s Cold War-era "Dead Hand" nuclear system. Analysts fear this escalating rhetoric may worsen global tensions and diplomatic relations.