As European intelligence chiefs meet in Germany calling for greater co-operation to tackle common security threats, we take a look Europe's move towards a more unified defence strategy. Since the Second World War, the NATO alliance has provided the West's defence umbrella. But there are those within Europe calling for the greater integration of national forces and less reliance on the United States and NATO to resolve Europe's defence problems. Russia's annexation of Crimea and the influx of migrants across Europe's southern borders have renewed this security debate on the continent. Would a Trump administration in the US provide NATO military support for crises such as these in the future? What role will Britain play in Europe's common defence policy after Brexit? This week on Newshour Extra, James Coomarasamy and a panel of guests discuss whether greater European military integration is really feasible - or even desirable.

Photo: a Polish officer follows a military training exercise, the 'Strong Europe Tank Challenge' in southern Germany. Credit: Getty Images