Usain Bolt of Jamaica reacts after winning the men's 200m final during the 15th IAAF World Championships at the National Stadium in Beijing, China August 27, 2015. REUTERS/Lucy Nicholson
BEIJING (Reuters) - Usain Bolt delivered Justin Gatlin a second knockout blow in five days to win his fourth straight 200 metres world title on Thursday and prove that when it comes to major championship sprinting, he simply has no peer.
In the seven years since the Jamaican first lit up the Bird's Nest at the 2008 Olympics, a disqualification in the 100 metres at the 2011 world championships is the only blemish on an otherwise perfect record in major global races.
