Olympic marathon champion fails drugs test

IMAGE: Jemima Jelagat Sumgong of Kenya celebrates after winning the gold medal in the women's marathon at the Sambodromo in Rio de Janeiro. Photograph: Buda Mendes/Getty Images Jemima......

PHOTOS: The gold medallists on Day 16 at Rio Olympics

Check out the gold medallists on Sunday, Day 16 of the 2016 Games in Rio de Janeiro. Boxing: Yoka wins Super-heavy gold for France IMAGE: Tony Yoka celebrates after winning the men's Super......

PHOTOS: The gold medallists on Day 9 at the Rio Olympics

Check out the gold medallists on Day 9 of the Rio Olympics on Sunday: IMAGE: Simone Biles of the United States celebrates winning the gold medal in the women's Vault final on Day 9 of the Rio......