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& Ukrainian forces are claiming new successes Tuesday against Russian invaders. A counteroffensive has retaken a strategically important town west of Kyiv, and the southern port city of Mariupol continues holding out despite being hammered from air, land and sea. Jane Ferguson reports in southwestern Ukraine. 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