Who sets a World Record in the women's 400m hurdles at US championships after 16 years?

29-year-old Dalilah Muhammad set World Record in the women's 400m hurdles at 2019 USA Track & Field (USATF) Outdoor Championships after 16 years, set by Russia's Yuliya Pechonkina in 2003. The event was held in Drake stadium, in Des Moines, Lowa, United States.Dalilah Muhammad Record broken: She won in 52.20 seconds beating the previous record of 52.34seconds.