HIGHLIGHTS: USA women 4x400m relay team scorches competition, win gold

U.S. women's 4x400m relay dominates for gold

Global Reels on Instagram: "The 4×100 m relay finals at the London 2012 Olympics delivered one of the fastest nights in track and field history, with world records falling in both the women’s and men’s races inside the same stadium. On August 10, the United States women—Tianna Madison, Allyson Felix, Bianca Knight, and Carmelita Jeter—executed a near-perfect baton exchange sequence to stop the clock at an astonishing 40.82 seconds, erasing a world record that had stood for 27 years. Less than 24