August 28, 2011
Usain Bolt of Jamaica reacts after being disqualified for a false start in the men's 100 metres final at the IAAF World Championships in Daegu August 28, 2011. REUTERS/Phil Noble
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DAEGU, South Korea (Reuters) - Usain Bolt and Kenenisa Bekele relinquished their world titles on Sunday when the world's fastest man and the most successful distance runner false-started and failed to finish in the 100 and 10,000 metres finals.