https://winter-olympics-2014.blogspot.com/2024/08/athletics-usa-break-mixed-4x400m-relay.html
" USA break mixed 4x400m relay world record Night 1 in the Stade de France and we already have our first world record of the meet! It's come in the first heat of the mixed 4x400m relay. The USA – Vernon Norwood, Shamier Little, Bryce Deadmon, and Kaylyn Brown cross the line in 3:07.41, taking over a second off the previous best!"