Ethiopia's Mohammed Aman, front, crosses the finish line ahead of United States' Nick Symmonds, second from right, Djibouti's Ayanleh Souleiman, left, and Poland's Marcin Lewandowski, right, in the men's 800-meter final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Tuesday, Aug. 13, 2013. (AP Photo/Anja Niedringhaus)