Is it over for Russia in Ukraine?

Since the weekend, Ukrainian forces have recaptured thousands of square kilometres of territory, in a lightning-speed advance that caught the Russians by surprise.  So could Ukraine be winning the war?  Today, retired US army major and urban warfare expert, John Spencer, on the remarkable comeback, and how Ukrainian troops pulled it off.  Featured:  John Spencer, retired US army major and chair of urban warfare studies, Madison Policy Institute  Subscribe to ABC News Daily on the ABC listen app.