A At 11:28 a.m. on Saturday, August 12, 2000, high in the Arctic Circle under the roiling surface of the unforgiving Barents Sea, Captain Gennady Lyachin was taking the Kursk, the pride of Russia's elite Northern Fleet, through the last steps of firing a practice torpedo, part of an elaborate naval exercise. Suddenly, the torpedo exploded in a massive ?reball, instantly incinerating all seven men in the submarine's forward compartment. The horror,...