Today marks one year since Russia began its latest invasion of Ukraine: one year since tanks rolled across the border, one year since missiles struck the capital and beyond, one year since the post Cold War world changed forever. Now, the expected defeat of Ukraine is clearly a long way off, but any sense of how this war might end feels equally far from reality - with Joe Biden this week reaffirming the West’s commitment to Ukraine’s fight for as long as it takes - while Vladimir Putin used his state of the nation speech to double down on his worldview. In today's Fourcast, our Europe editor Matt Frei speaks to us from Kyiv, the capital where he was last year when the first bombs fell, and where he was again this week to take in the latest, historic events in this 21st century conflict. Sources: AP  Producer: Freya Pickford and Alice Wagstaffe