2016 Rio Olympics: Michael Phelps trying to make history
Saturday, June 25, 2016 - 16:31
in Earth & Climate
The Sports Xchange The 2016 U.S. Olympic Trials get underway in Omaha, Neb., on Sunday with hundreds competing -- including swimming legend Michael Phelps -- over the eight-day meet for the 52 spots on the team going to the Rio Games.