Russian President Vladimir Putin’s aide, Dmitry Medvedev, issued a tough warning to NATO. Medvedev warned NATO against the “fatal mistake” of dismissing Kremlin nuclear capabilities. He warned that Moscow is not bluffing about using tactical nuclear weapons in Ukraine and that Western support to Ukraine may risk the escalation of war. This comes after the U.S. permitted Ukraine to use American weapons to strike inside Russian territories. Watch this video to know more.