By Clarke Canfield

Greg Brooks, co-manager of Sub Sea Research, is seen aboard the salvage ship Sea Hunter in Boston Harbor Wednesday, Feb. 1, 2012 holding a picture of the British merchant ship Port Nicholson which was sunk by a German U-boat in 1942 with a cargo of 71 tons of platinum now worth about $3 billion. Brooks will use the Sea Hunter to recover the cargo of the Port Nicholson. A port hole of the Port Nicholson can be seen on the screen behind Brooks. (AP Photo/Winslow Townson)
If the claim proves true, it could be one of the richest sunken treasures ever discovered.
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