Donald Trump has backed Ukraine to retake all its occupied territory in an astonishing U-turn on the war. Posting on Truth Social after talks with Zelenskyy in New York, Trump said that "Ukraine, with the support of the European Union, is in a position to fight and WIN all of Ukraine back in its original form". Sky's security and defence analyst Professor Michael Clarke has been looking at how possible this is. Follwo live updates: https://news.sky.com/story/un-latest-zelenskyy-to-address-general-assembly-after-trumps-big-shift-on-ukraine-13435340 #donaldtrump #zelenskyy #ukrainewarnewslatest #putin #russia #nato SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews Follow us on TikTok: https://www.tiktok.com/@skynews For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB Sky News Daily podcast is available for free here: https://podfollow.com/skynewsdaily/ To enquire about licensing Sky News content, you can find more information here: https://news.sky.com/info/library-sales