SKILLS May 9, 2021 Michael Norman sets men's 400m stadium record at Mt. SAC in 2021 USATF Golden Games | NBC SportsMichael Norman puts up a 44.40 at Mt. SAC to clock the second fastest 400m time of the year and win at the USATF Golden Games in Walnut, Calif. #NBCSports #USATF #GoldenGames » Subscribe to NBC Sports: » Watch Live…