When the SS Gairsoppa was torpedoed by a German U-boat 70 years ago, it took its huge silver cargo to a watery grave. US divers are working to recover what may be the biggest shipwreck haul ever, valued at some $210 million.Florida-based Odyssey Marine Exploration on Monday confirmed the identity and location of the Gairsoppa, and cited official documents indicating the British ship was carrying some 219 tons of silver when it sank in 1941 in the North Atlantic some 300 miles (490 kilometers) off the Irish coast.
