“Only my training from boyhood up, in the water and under it, gave me the courage to jump.” ON MAY 7, 1915, the German U-boat U-20 fired a torpedo into the side of the passenger liner RMS Lusitania as it…

IT WAS JUST after 1:30 p.m. on May 7, 1915 when the lookouts aboard U-20, a German submarine operating 14 miles off the coast of south-western Ireland, spied a tempting target: the RMS Lusitania, a 31,500 ton British passenger…