-- AFP PICTURES OF THE YEAR 2015 -- Jamaica's Usain Bolt (2nd R) celebrates before (L-R) USA's Justin Gatlin, USA's Tyson Gay and USA's Mike Rodgers as he wins the final of the men's 100 metres athletics event at the 2015 IAAF World Championships at the "Bird's Nest" National Stadium in Beijing on August 23, 2015. AFP PHOTO / OLIVIER MORIN