The 2020 Summer Olympics in Tokyo also added six new events featuring men and women competing on the same teams in swimming, track, triathlon, archery, judo and table tennis.
The was expected to continue expanding and by 31 December 2021, it was 783 km 487 mi in length.
Beijing's Olympics mascot is , a wide-eyed panda in a suit of ice.
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Fellow Americans Tessa Maud and Zoe Kalops didn't advance either.
The 26-year-old star then failed to finish the event after she crashed about 10 gates into her run.