Olympic champion Dalilah Muhammad has broken one of the longest standing world records in women's athletics.
The 29-year-old clinched victory in the 400-metre hurdles at the US Championships in Des Moines, Iowa, clocking a time of 52.20 seconds.
She was 0.14 seconds faster than Russia’s Yuliya Pechonkina, who had set the previous world record 16 years ago.
Dalilah was already a notable runner because of her gold medal at the 2016 Rio de Janeiro Olympics in the same event.

New Zealand crush South Africa to reach T20 World Cup final
Dave Rennie becomes first Pacific Islander to lead All Blacks
FIFA offering $12 tickets to World Cup Play-Off Tournament
Resurgent Wolves stun Liverpool, Everton enjoy home comfort
Real Madrid's Rodrygo to miss World Cup for Brazil
