 First up was the women's 400 m hurdles with Olympic champion Melaine Walker despite not being favourite Walker flew to a new championship record of 52.42 to win the gold in the second fastest time in history.This took Jamaica above United States at the top of the medal table for the second time of the championships.On the same night Usain Bolt lined up for the 200 m final despite looking fatigued for the preliminary rounds in the final he ran a world record time of 19.19 seconds meaning that for everyone of his golds he had broken the world record and also that in Berlin he had knocked more than a tenth of a second of both his previous world records.