Usain Bolt

Bolt of Jamaica crosses the finish line ahead of Williams of Britain to win their men's 200 metres heat during the IAAF World Athletics Championships in Moscow

Fabrizio Bensch/Reuters

Usain Bolt of Jamaica (bottom) crosses the finish line ahead of Delanno Williams of Britain to win their men’s 200 metres heat during the IAAF World Athletics Championships at the Luzhniki stadium in Moscow, Russia, on Friday