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Norway's Karsten Warholm celebrates as he crosses the finish line to win the men's 400m hurdles final during the Olympic Games at the Olympic Stadium in Tokyo on Tuesday.

Norway's Karsten Warholm smashed his own world record to win gold in the men's Olympic 400 meters hurdles final in 45.94 seconds on Tuesday.

Team USA's Simone Biles watching the women's uneven bars final at the Olympic Games in Tokyo, Japan, on Sunday.