Help us continue to be your leading source for trustworthy news and information! Take our 2022 PBS NewsHour audience survey: https://app.keysurvey.com/f/41615816/5e49/?LQID=1& Russian troops have been shelling Kyiv for almost four weeks now as the key port city of Odessa came under attack for the first time. This as the U.N. estimates more than a quarter of the country's residents have now been displaced amid warnings from the Kremlin that bilateral relations between Russia and the U.S. are on the brink of collapse. Jane Ferguson reports. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: Facebook: http://www.pbs.org/newshour Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe