US-German relations strained over new spying allegations

Germany has summoned the US envoy following allegations that an agent working for Germany’s intelligence agency was spying for the US. Gideon Rachman is joined by James Blitz, former security correspondent, and Jeevan Vasagar, Berlin correspondent, to discuss what this means for already troubled relations between the Obama and Merkel governments, and how the two nations can resolve their differences in order to tackle the numerous shared geopolitical challenges they face.