Sydney McLaughlin-Levrone breaks her own world record with 50.65 finish in 400-meter hurdles at the U.S. Olympic trials

Sydney McLaughlin-Levrone breaks her own world record with 50.65 finish in 400-meter hurdles at the U.S. Olympic trials

EUGENE, Ore. -- Sydney McLaughlin-Levrone breaks her own world record with 50.65 finish in 400-meter hurdles at the U.S. Olympic trials.