#Athletics-McLaughlin-Levrone smashes #worldrecord to retain 400m hurdles crown #SydneyMcLaughlinLevrone obliterated her own #400metreshurdles #worldrecord with a time of 50.37 seconds to retain her Olympic title.

#Athletics-McLaughlin-Levrone smashes #worldrecord to retain 400m hurdles crown: #SydneyMcLaughlinLevrone obliterated her own #400metreshurdles #worldrecord with a time of 50.37 seconds to retain her Olympic title.