The day that is about to change baseball forever will also alter the world as we know it. A secret that has been three decades in the making is about to be revealed. A young ballplayer awaits the two words that will make him a household name overnight. An opening day crowd of 35,000 unsuspecting fans await the start of a game that will make each of them personal witnesses to a seminal moment in human history. Behind the plate umpire Walt Radovich adjusts his chest protector and feels the warmth surging within him, the little tremor of excitement that always precedes the first pitch. It is time! Walt inhales deeply, lifts his head regally in the air and shouts: "PLAY BALL!"