President Donald Trump has ordered two nuclear submarines to be positioned in "appropriate regions" following what he called "highly provocative" threats from former Russian President Dmitry Medvedev. The move comes after Medvedev reacted strongly to Trump’s ultimatum to end the war in Ukraine by August 8 or face heavy sanctions. While Trump did not specify whether the submarines are nuclear-powered or nuclear-armed, he warned that words can lead to unintended consequences.