"From the summer of 1942 until the end of 1943, Ernest Hemingway actively patrolled the Gulf Stream and the waters off Cuba's north shore in his wooden fishing boat, Pilar, looking for German submarines. His patrols were supervised by the U.S. Navy and served as a part of antisubmarine warfare at a time when U-boat attacks were decimating Allied merchant shipping in the region. The huge, long-distance subs ultimately sank hundreds of ships in the...