Americans Athing Mu (2:01.10), Raevyn Rogers (2:01.42) and Ajee Wilson (2:00.02) move on to the semifinals of the 800m in Tokyo. #NBCOlympics #Tokyo2020 #TrackAndField » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch live Olympic coverage on NBCOlympics.com: https://www.nbcolympics.com/schedule Stay up…