Karsten Warholm, Norway, reacts to winning Olympic gold and breaking the world record in the 400 meter hurdles. 45.94 sec #Tokyo2020 . . . . . #karstenwarholm #norway #400mhurdles #jeffcohenphoto #athletics #trackandfield #hurdles #norge #worldrecord @kwarholm @olympicteamnorway @europeanathletics @worldathletics