From left, United States' Jennifer Simpson, Sweden's Abeba Aregawi and Kenya's Hellen Onsando Obiri pose on the podium during the medal ceremony for the women's 1500-meter at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Friday, Aug. 16, 2013. Aregawi won gold, Simpson silver and Obiri bronze. (AP Photo/Alexander Zemlianichenko)