FILE - Russia's Natalya Antyukh, right, powers ahead of United States' Lashinda Demus to win gold in the women's 400-meter hurdles final during the athletics in the Olympic Stadium at the 2012 Summer Olympics in London, Wednesday, Aug. 8, 2012. Russian 400-meter hurdler Natalya Antyukh will lose her gold medal from the 2012 London Games due to doping, putting American Lashinda Demus in position to be named the champion more than a decade after the race. (AP Photo/Daniel Ochoa De Olza, File)

FILE - Russia's Natalya Antyukh, middle, holds the gold medal, United States' Lashinda Demus, left, the silver medal and Czech Republic's Zuzana Hejnova, the bronze medal during a ceremony for the women's 400-meter hurdles in the Olympic Stadium at the 2012 Summer Olympics, London, Thursday, Aug. 9, 2012. Russian 400-meter hurdler Natalya Antyukh will lose her gold medal from the 2012 London Games due to doping, putting American Lashinda Demus in position to be named the champion more than a decade after the race. (AP Photo/Matt Slocum, FIle)