The Islamic Republic’s failed strike on Diego Garcia suggests that even the most secure outposts are no longer beyond reach. For decades, distance was Diego Garcia’s greatest defence. Marooned in the central Indian Ocean, far from the Middle East’s turmoil and the Pacific’s rivalries, the atoll functioned as America’s unsinkable aircraft carrier. Iran’s recent attempt to strike the island with ballistic missiles, though unsuccessful has punctured the illusion of sanctuary. On