US informed Russia of Joe Biden’s Kyiv visit hours before departure: <a href="https://www.theguardian.com/us-news/2023/feb/20/how-biden-pulled-off-a-visit-to-an-active-ukrainian-war-zone" rel="nofollow">https://www.theguardian.com/us-news/2023/feb/20/how-biden-pu...</a>