Three little letters that will change your life forever. Lou Gehrig, also known as the Iron Horse, had an outstanding record in his years as a professional baseball player: 2,130 consecutive games played, 493 home runs, and 2,721 hits. All of this came before he was diagnosed with ALS at the age of thirty-six. In his farewell speech to his fans and teammates, he made a startling comment, "Today I consider myself the luckiest...