Saturday marks the end of the high-profile swimming events at the Summer Olympic Games in Rio de Janeiro, with U.S. star Michael Phelps set to swim his last race, the 4X100-meter medley relay. Also Saturday, the Jamaican sprinter known as the world's fastest man, Usain Bolt, began his Olympic events with the first heat of the 100-meter sprint. The 29-year-old Bolt, who has set and broken his own world records for the race, is fully expected to be competing in the finals Sunday night despite a sore hamstring.
Day 8: Rio Olympic Games
1
American Ibtihaj Muhammad celebrates after winning a point to Russia in a women's team sabre fencing semifinal at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 13, 2016.
2
Darya Safai pleads with security personnel as they consider removing her for holding up a large sign protesting the fact that women have not been allowed to attend volleyball matches in Iran, during a men's preliminary volleyball match between Egypt and I
3
Cape Verde's Davilson Dos Santos Morais, is knocked down by Britain's Joe Joyce during a men's super heavyweight over 91-kg preliminary boxing match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 13, 2016.
4
United States' Melissa Gonzalez, right, falls while fights for the ball with Britain's Nicola White during a women's field hockey match at the 2016 Summer Olympics in Rio de Janeiro, Brazil, Aug. 13, 2016.
