”It is easy to imagine how a permanent structure would quickly symbolise the anti-Turkish camp or give the impression of a fortress Christian Europe that wants to keep Muslims out,” said a European diplomat. “Putting up fences would not be helpful at a time when it is more important to build bridges.”America’s wall, built at a cost of £1.6 billion over the past five years is a high-technology barrier backed-up by CCTV cameras, radar surveillance, armed patrols and predator drones.