The Siege on CitizenshipThe cloud renders geography irrelevant, writes James Bridle, until you realize that everything that matters, everything that means you dont die, is based not only on which passport you possess, but on a complex web of definitions of what constitutes that passport. The case of Mohamed Sakr, a man deprived of his UK citizenship and later killed by a US drone, shows how such definitions are constantly under attack. James Bridle is a writer and artist