War in Ukraine explained: how could the war play out and how long could it last?

How long could the war in Ukraine last? Is there any chance of foreign forces directly intervening in the conflict? What effect, if any, will sanctions have on Putin? What else can Western and NATO countries do to counteract Russia’s aggression? James Rogers, Co-Founder and Director of Research at the Council of Geostrategy, speaks to NationalWorld's Heather Carrick.