Mixed defence news for India this week: the county’s first indigenously built nuclear-powered submarine was activated days before an incident in which the kilo-class submarine INS Sindhurakshak exploded. Eighteen Indian sailors are feared dead. The Economist …

Barack Obama and Xi Jinping will meet in California this Friday and Saturday. The extended and comparatively informal meeting has the potential to shape the relationship of the two leaders, and of their countries. It …