Summary: This week's Nato Summit in Wales comes against a background of escalating tensions between Russia and Nato over the conflict in Ukraine, with calls for tougher action against Moscow. How far should Nato go in protecting countries that are not members of the Alliance like Ukraine? HARDtalk speaks to President Giorgi Margvelashvili of Georgia, a country that was at war with Moscow six years ago. What's his advice to Nato?
