THEIR headquarters are separated only by a three-kilometre taxi ride across Brussels, and over the years they have declared their shared interests and common values any number of times. But despite having 22 members in common, NATO and the EU have always found it easier to talk about co-operating to than to do so.

THEIR headquarters are separated only by a three-kilometre taxi ride across Brussels, and over the years they have declared their shared interests and common values any number of times. But despite having 22 members in common, NATO and the EU have always found it easier to talk about co-operating to than to do so.