Michael Phelps swims in the men's 100-meter butterfly final at the U.S. Olympic swimming trials, Saturday, July 2, 2016, in Omaha, Neb. Phelps won the race.
Michael Phelps swims in the men's 100-meter butterfly final at the U.S. Olympic swimming trials, Saturday, July 2, 2016, in Omaha, Neb. Phelps won the race. Mark J. Terrill AP
Michael Phelps swims in the men's 100-meter butterfly final at the U.S. Olympic swimming trials, Saturday, July 2, 2016, in Omaha, Neb. Phelps won the race. Mark J. Terrill AP

Michael Phelps, at 31, swims in his fifth Olympics with a joyful mind-set

July 30, 2016 05:25 PM