U.S. gymnast Simone Biles, 19, wowed audiences and judges with her dynamic and creative performances -- earning her four gold medals.
Scandal broke out in Brazil when four U.S. swimmers, led by multimedal winner and veteran Olympian Ryan Lochte, claimed they had been robbed by gunmen posing as police as the athletes returned to the Olympic village. Rio police used security-camera footage to show a different story of the swimmers vandalizing a gas station before paying security guards for the damage that contradicted the made-up story that angered Brazilians and forced the U.S. athletes to apologize.