Russia's invasion of Ukraine has triggered one of the most deadly wars in Europe since World War Two and the deepest crisis in Moscow's relations with the West since the 1962 Cuban Missile Crisis.He was speaking after the U.S. embassy to Russia released a video that it called an "an appeal to the people of Russia".The 50-second video included images of the impact of bombing in Ukraine, saying what was happening there "is not worthy of you".Medvedev, a close Putin ally, lashed out at the video, describing the U.S. government as cynical "freaks" and "sons of bitches" who he said were using the tricks of Nazi propagandist Joseph Goebbels.Since the war began, Medvedev's rhetoric has become increasingly vitriolic though his published views sometimes chime with thinking at the top levels of the Kremlin elite."