Freestyle swimming has been included in every modern Olympics. Currently, freestyle is contested in more Olympic events than any other stroke, at distances of 50m, 100m, 200m, 400m, 800m, and 1500m.

Saturday morning's events include qualification in the 200 backstroke, 100 freestyle, 200 breaststroke and 200 butterfly.

Mark Spitz nearly mastered swimming's most difficult stroke, the butterfly. Fulfilling all the pre-Olympic hype, he won four individual events -- in the 100- and 200-meter freestyle and 100- and ...