
United States’ Justin Gatlin, centre, races in a men’s 100m semifinal at the World Athletics Championships at the Bird’s Nest stadium in Beijing, Sunday, Aug. 23, 2015. (AP Photo/Lee Jin-man)
United States’ Justin Gatlin, centre, races in a men’s 100m semifinal at the World Athletics Championships at the Bird’s Nest stadium in Beijing, Sunday, Aug. 23, 2015. (AP Photo/Lee Jin-man)