United States' Brianna Rollins, right, runs ahead of Virginia Crawford, left, in the women's 100m hurdles at 2014 IAAF World Challenge Beijing held at China's National Stadium in Beijing, Wednesday, ... more 
United States' Brianna Rollins, right, runs ahead of Virginia Crawford, left, in the women's 100m hurdles at 2014 IAAF World Challenge Beijing held at China's National Stadium in Beijing, Wednesday, May 21, 2014. (AP Photo/Alexander F. Yuan) less 
1 / 1
Associated Press | Photo By Alexander F. Yuan
Wed, May 21, 2014 12:12 PM EDT