奥运第6天:中美金牌数持平 - August 03, 2012

After six days of Olympic competition, China and the U.S., the world's two largest economies, are locked in a close race for the most gold medals, with each country so far winning 18.

One of the biggest stories has been the success, and consequent criticism, of Ye Shiwen. The 16-year-old Chinese swimmer's stunning performance has earned her gold medals in both the women's 200-meter and 400-meter events.