A member of the police bomb squad walks away from an unattended backpack left on the road near the finish line of the Boston Marathon in Boston. A man is in police custody following the security alert, which prompted evacuations of the surrounding area.
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The First Lady gave an enthusiastic backing for the Democratic presidential frontrunner in a speech at the Democratic National Convention.
Vitaly Stepanov, who helped uncover the Russian doping scandal, says the IOC is less concerned about ridding world sport of drug cheats.
Colombian drug lord Daniel Barrera Barrera was fined $10m for manufacturing hundreds of tonnes of cocaine that he trafficked globally.