Allyson Felix starred in the USA team that set a new world record in the mixed 4x400m relay final. Their time of 3:09.34 earned the team of Wilbert London, Felix, Courtney Okolo and Michael Cherry the first ever IAAF World Athletics Championships mixed 4x400m relay gold medal. #4x400m #Mixed4x400m #Mixed4x400mRelay #USA #UnitedStates #AllysonFelix #WilbertLondon #CourtneyOkolo #MichaelCherry See more moments from the 2019 World Athletics Championships in our Doha Moments playlist - youtube.com/playlist?list=PLz-gfY4so9kYzhUfPKFZBtaT90bQmMuYt Subscribe to our channel - youtube.com/user/IAAF2012?sub_confirmation=1 ⭐️ Follow us on Twitter - twitter.com/iaaforg ⭐️ ⭐️ Follow us on Facebook - facebook.com/WorldAthleticsClub ⭐️ ⭐️ Follow us on Instagram - instagram.com/iaaf_athletics ⭐️ Make sure you subscribe for athletics highlights, interviews with the athletes, training tips and more!