Farewell Usain Bolt, a wonder of our sporting age
Updated 1936 GMT (0336 HKT) August 5, 2017
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- Bolt will retire after IAAF World Championships
- Jamaican is most successful sprinter in history
- Will aim to add to his 11 world titles
(CNN)The end is coming. A marvel of this sporting age is one championship away from retirement, 30 seconds or so from consigning himself to history.