Sydney McLaughlin eclipses own 400m hurdles world record at USA Track and Field Outdoor Championships
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Sydney McLaughlin pushes boundaries with huge 400m hurdles world record | World Athletics Championships | The Guardian
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US Championships 2019: American Sprinter Dalilah Muhammad Breaks World 400-Meter Hurdles Record, Surpasses Yuliya Pechonkina of Russia | LatestLY
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Dalilah Muhammad Breaks 16-Year-Old World Record in 400-Meter Hurdles | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
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