World records fall as the track and field world championships concluded over the weekendArmand “Mondo” Duplantis, Tobi Amusan and Sydney McLaughlin broke world records to put an exclamation point on the first United States hosted World Athletics ChampionshipsU.S. women win third consecutive world title in the 4x400m relayThe relay team of Talitha Diggs, Abby Steiner, Britton Wilson and Sydney McLaughlin brought home the third consecutive 4x400m relay gold for Team USA on Sunday night in Eugene.Upsets allow for new champions to emerge in EugeneRunners, throwers and jumpers emerged from the shadows during day five of competition to claim titles in 400m hurdles, the 1500m, discus and hurdlesMutaz Essa Barshim wins third consecutive gold medal in high jumpBarshim defied odds after an uneventful season to accomplish the goal of winning three consecutive world titles which had not previously been done by a jumper.Track legend Allyson Felix to take final victory lap Friday nightAllyson Felix will represent the United States one more time in the mixed relay Friday evening at World Championships. Will she secure her 19th international podium spot?2012 Olympic silver medalist Nijel Amos will not compete in Eugene due to doping allegationsAmos was notified his June 4th blood sample revealed a banned substance, after already arriving in Eugene to prepare for the World Championships