USA Break Women's 4 x 100m Relay World Record - London 2012 Olympics

Watch the Women's 4x400m Relay Final from the 2017 World Athletics Championships, where reigning Olympic winners team USA claimed World Championships gold. #WorldChampionships #TeamUSA #Relay #WorldAthletics #Athletics Watch the other finals on our 2017 World Championships playlist - Subscribe to our channel - ⭐️ Follow us on Twitter - ⭐️ ⭐️ Follow us on Facebook - ⭐️ ⭐️ Follow us on Instagram - ⭐️ Make sure you subscribe for athletics highlights, interviews with the athletes, training tips and more!