Such a great sport. The training that goes into it -lap after lap after lap, back and forth, back and forth, rain, fog, whatever. And for these great swimmers it likely begins sometime around ages 6-10. I recall those nights watching my son-back and forth, back and forth-outside in the fog-and then to go home and do homework. I can't imagine how much time those kids that make the Olympics must have to spent in the water.