When a group of Austrian cavers exploring a network of abandoned military tunnels in the Italian Alps comes across human remains at the bottom of a deep shaft, everyone assumes the death was accidental - until the still unidentified body is stolen from the morgue and the Defence Ministry puts a news blackout on the case. And is the recent car bombing in Campione d'Italia, a tiny tax haven surrounded on all sides by Switzerland, somehow related? The whole affair has the whiff of political intrigue. That