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."
The 21-year-old has struggled with knee problems and missed last year's world championship with chronic back pain.
"I went to a football game to see Brazil play Sweden, but after Pokemon Go started I lost interest."
"This is the way I wanted to finish my career," he said.
"I am falling victim to those who created a system of manipulating our beautiful sport and is guilty of using it for...
His total medal haul has now risen to 26, including two silvers and two bronzes, with the 100 meters butterfly still...
"We reached the Games in a very significant economic crisis. Political changes also affected the mood of the Brazilian people."
"King and Efimova are flat characters in an Olympic tale that borders on jingoism." -- Washington Post
He became first Vietnamese athlete to win two Olympic medals
Phelps has by far the most of any Olympic athlete and is the only one to win eight golds at...