Russian President Vladimir Putin said Tuesday his war in Ukraine will continue until it has achieved the goals he set forth, and he insisted all was going according to plan, despite dogged Ukrainian resistance. This came as Ukrainian officials investigated the possible use of a chemical agent in Mariupol. Simon Ostrovsky sat down with Ukraine Foreign Minister Dmytro Kuleba to discuss the war. 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