2015 IAAF Championships (56 images)

Jamaica's Nickel Ashmeade, Asafa Powell, Usain Bolt and Nesta Carter pose for selfies with phones from the crowd after winning the 4x100 meters relay final at the IAAF World Championships being hosted by Beijing on August 29, 2015. Jamaica won with a time of 37.36 seconds, followed by China (38.01) and Canada (38.13) in third. USA was disqualified. Photo by Stephen Shaver/UPI

Great Britain's Mohammed Farah lies on the track while Kenya's Caleb Mwangangi Ndiku points to the sky after competing in the 500 meters final at the IAAF World Championships being hosted by Beijing on August 29, 2015. Farah won with a time of 13:50.38, followed by Ndiku (13:51.75) and Ethiopia's Hagos Gebrhiwet (13:51.86) in third. Photo by Stephen Shaver/UPI

Jamaica's Noviene Williams-Mills (L) beats USA's Francena McCorory to the finish line in the 4x400 meters relay final at the IAAF World Championships being hosted by Beijing on August 30, 2015. Jamaica won with a time 3:19.13, with USA (13:19.44) second and Great Britain and N.I. (3:23.62) finishing third. Photo by Stephen Shaver/UPI

Jamaica's Noviene Williams-Mills (R) is joined by teammate Christine Day after beating USA's Francena McCorory to the finish line in the 4x400 meters relay final at the IAAF World Championships being hosted by Beijing on August 30, 2015. Jamaica won with a time 3:19.13, with USA (13:19.44) second and Great Britain and N.I. (3:23.62) finishing third. Photo by Stephen Shaver/UPI