The United States accused Russia of escalating the conflict in Ukraine by deploying North Korean troops, after the Kremlin warned that Washington would deepen its involvement in the war by allowing Kyiv's forces to strike far into Russia with US-made weapons. For in-depth analysis and a deeper perspective of Russia's war on Ukraine as it reaches a grim 1000-day milestone, FRANCE 24's Gavin Lee is joined by Dr Samuel Ramani from the Royal United Services Institute.