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Centenarian Fauja Singh competes in a 200 meter race for centenarians in Toronto, Thursday Oct. 13, 2011. One-hundred-year-old Singh, originally from India now living in London, England, is competing in Toronto's Waterfront Marathon on Sunday. (AP Photo/The Canadian Press, Chris Young)

Centenarian Fauja Singh competes in a 200 meter race for centenarians in Toronto, Thursday Oct. 13, 2011. One-hundred-year-old Singh, originally from India now living in London, England, is competing in Toronto's Waterfront Marathon on Sunday. (AP Photo/The Canadian Press, Chris Young)

World's oldest marathoner retires

Fauja Singh, the world's oldest marathon runner at 101-years-old, took part in a 10-kilometer race at the Hong Kong Marathon and officially retired from public races on Feb. 24.