 The Jamaicans have been at the top of the world sprinting-wise, both men and women, since 2008. Hussain Bolt and maybe even since 2004. So for 20 years, they've been dominating the sprinting world. The United States is making a big comeback this year. Mark my words. Kari Richardson, watching her come around the curve in the 200. It's insane. It's like she was just shot out of a cannon. It's crazy.