Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

BEIJING, CHINA - AUGUST 29:  Usain Bolt of Jamaica celebrates after crossing the finish line to win gold in the Men's 4x100 Metres Relay final during day eight of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 29, 2015 in Beijing, China.  (Photo by Patrick Smith/Getty Images)
BEIJING, CHINA - AUGUST 29:  Usain Bolt of Jamaica celebrates after crossing the finish line to win gold in the Men's 4x100 Metres Relay final during day eight of the 15th IAAF World Athletics Championships Beijing 2015 at Beijing National Stadium on August 29, 2015 in Beijing, China.  (Photo by Patrick Smith/Getty Images)

    JUST WATCHED

    Usain Bolt reflects on losing gold medal

MUST WATCH

Usain Bolt reflects on losing gold medal

During an interview with CNN's Amanda Davies, Jamaican sprinter Usain Bolt discusses losing one of his Olympic gold medals after his teammate tested positive for a banned substance.

Usain Bolt reflects on losing gold medal

During an interview with CNN's Amanda Davies, Jamaican sprinter Usain Bolt discusses losing one of his Olympic gold medals after his teammate tested positive for a banned substance.