It sounds like the plot of a thriller: an Arab prince and a French marine archaeologist mount a high-tech salvage of $380 million in silver, one and a half miles beneath the Arabian Sea, from a shipwreck that is a secret from World War II. But the tale of the USS John Barry, sunk in 1944 by a German U-boat while on a mission whose destination remains unknown, is all the more gripping for being true... Did President Roosevelt really intend to pay off the Soviets as part of a strategy to sideline the British Empire?...