Xu Mengtao RETAINS her gold medal defense 💪🥇

China's aerials queen is golden once more. Xu Mengtao won back-to-back Olympic gold in women's aerials after successfully landing a back full-full-full on Wednesday in Livigno, Italy. Coverage presented by Delta. #NBCSports #WinterOlympics #FreestyleSki » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Live Olympic coverage on NBCOlympics.com: https://www.nbcolympics.com/schedule Watch...