USA wins the total medal count at the IAAF, but everyone will remember Usain Bolt and Jamaica’s dominance on the track.  USA had 10 Gold’s, Jamaica had 7.  Two of USA gold medals were in the women 400m and the 4 x 400, Sanya Richards won the gold in the 400 & she was on the team who won the 4×400, Sanya Richards is an US citizen but she was born in Jamaica.