It has been nearly eight years since George Bush declared Bin Laden “wanted, dead or alive” and described his capture as a national priority. Bush is now back in Texas, living a low-profile post-presidential existence. He has been photographed lugging shopping bags around and been heard complaining about picking up his own dog’s droppings. Bin Laden, meanwhile, remains as elusive as ever, despite the billion-dollar, multi-force, multinational, state-of-the-art aerial drone search - the most extensive and expensive manhunt in history.