Liu and Dayron Robles, right, of Cuba compete during the 110 m hurdles final during the 13th IAAF World Athletics Championships in Daegu, South Korea, on Aug 29, 2011. Robles was later stripped of the gold medal after bumping Liu in a physical track tussle. Liu was elevated to silver after finishing third in 13.27 sec. Jason Richardson from the United States was promoted to gold, clocking 13.16. [Photo/CFP]