Top photos from the past week. 

  "There you go, I am the greatest."

  "I don't need to prove anything else. What else can I do to prove to the world I am the greatest...

  Usain Bolt said he was surprised to hear Gatlin booed.

  "Somebody said I can become immortal. Two more medals to go and I can sign off. Immortal."

Top photos from the Rio Olympics.

Top photos from the past week.

Top Reuters photos from the last 24 hours. 

Top photos from the last 24 hours.

Usain Bolt looks ahead to the World Championships in Beijing at a promotional event in New York City.