Warholm crushes 400-hurdles record by The Associated Press | Today at 2:08 a.m. TOKYO -- Karsten Warholm of Norway obliterated his own world record in the Olympic 400-meter hurdles today, finishing in 45.94 to break the old mark by 0.76 seconds. One of the most anticipated races on the program more than lived up to the hype. Second-place finisher Rai Benjamin of the United States finished in 46.17, a mark that also crushed the 46.7 that Warholm set last month. Warholm tore open his jersey when he crossed the line first. He flashed the same mouth-gaping look of amazement as when he announced himself on the world stage with his victory at the world championships in 2017.