Photo : Courtesy of Olivier Morin/AFP/Getty Images

Pictures of the Year – SI.com Photos

Jamaica’s Usain Bolt wins the 100 metres final at the 2013 IAAF World Championships while a lightning bolt strikes in the sky. Bolt timed a season’s best 9.77 seconds, with American Justin Gatlin claiming silver in 9.85sec and Nesta Carter, also of Jamaica, taking bronze in 9.95sec….