Hong Kong - The world's oldest marathon runner says he has run his final race.
Fauja Singh, 101, ran the Hong Kong 10-K Sunday.
He is a great-grandfather who took up marathon running ten years ago.
Singh's efforts have inspired people around the world.
He's known as the "Turbaned Tornado." A biography about him bears the same name.
Singh said he's going to keep running for pleasure -- because it makes him happy -- but he added, "True happiness comes from within."