On geopolitics in the Eastern Europe, Ukraine and NATO's open-door policy RAVEN on air

The past few weeks have brought a dynamic development in the Eastern Europe. Poland and Lithuania are dealing with migrants being sent to their borders by Lukashenko's regime and Russia's military build-up on its borders with Ukraine raised concerns in the West. How should NATO engage with Ukraine? What is the future of NATO's open-door policy? Are Allies and the EU doing enough? And how does China fit into this? The host of this episode of RAVEN on air was the former US Ambassador to NATO and former US Special Representative for Ukraine Kurt Volker.