""'Oh my God, is this really happening? '" "It was halfway through the 200-meter breaststroke finals at the 1998 World Championships and the rookie was gliding four feet beneath the water's wind-rumpled surface. Above him, 15,000 spectators were screaming encouragement and millions more were watching on live international television. All of them could see what the rookie and the seven other finalists could not: the actual race as it unfolded." "Underwater,...