Jamaica's Usain Bolt crosses the finishing in front of United States' Justin Gatlin, left, to win the men’s 100m final at the World Athletics Championships at the Bird's Nest stadium in Beijing, Sun., Aug. 23, 2015.
Jamaica's Usain Bolt crosses the finishing in front of United States' Justin Gatlin, left, to win the men’s 100m final at the World Athletics Championships at the Bird's Nest stadium in Beijing, Sun., Aug. 23, 2015. David J. Phillip AP
Jamaica's Usain Bolt crosses the finishing in front of United States' Justin Gatlin, left, to win the men’s 100m final at the World Athletics Championships at the Bird's Nest stadium in Beijing, Sun., Aug. 23, 2015. David J. Phillip AP