Karsten Warholm (NOR) poses with Norwegian flag after winning the 400m hurdles in a meet record 46.92 to become the third man to run under 47 seconds in the IAAF Diamond League final during the Weltkasse Zurich at Letzigrund Stadium, Thursday, Aug. 29, 2019, in Zurich, Switzerland. (Jiro Mochizuki/Image of Sport)
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