let s return to tokyo and the olympics. it s been a busy day of sporting events at the games. live to sarah mulkerrins. sarah, we ve already have already had a world record on the track? absolutely, we are getting used to this. about this time every day. yesterday, we had karsten warholm in the hurdles. today, the same event for women, another world record. this was such a phenomenal race. we had sidney maclachlan from the usa. she was coming and as the world record holder. she has this battle up against another fellow american. muhammad is the olympic champion. they went head to head at the trials. when mclaughlin won and set the record. she won again today, getting to the line just in 51.46 seconds. phenomenal time.