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Boys vs. Girls Gymnastics Challenge ft. Rybka Twins

Britt Hertz faces a girls vs. boys gymnastics challenge with the Rybka Twins, testing the differences in technique and strength. Trump vows 'big retaliation' as 'sell America' list grows What are ...
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Watch groups of athletes compete in a gymnastics challenge

Britt Hertz joins the Rybka Twins for a team-based gymnastics competition between girls and boys.