Sky's defence and security analyst Professor Michael Clarke says Vladimir Putin is pursuing a new strategy to finish the war in Ukraine this year and warns Russia may launch a major air strike on Kyiv within the next 24 hours. The warning follows a Ukrainian attack on an oil refinery near Moscow. To get more from Michael Clarke including access to the full War Briefings and his exclusive insights and analysis, download and subscribe to Sky News Defence Insider. Download the Defence Insider app: https://qrcode.skynews.com/DefenceInsiderYouTube2 Using Android? Android user? Sign up to hear when Sky News Defence Insider comes to Android Paid subscription required for full access. UK only. 18+. T&Cs apply. #ukraine #russia #war #skynews