,,,,,McCallum, who was the first US athlete to compete on the uneven bars in the minutes after Biles told her teammates that she was pulling out of the final, confessed that she was left 'on the verge of tears' by the news - as well as the added pressure that was placed on her and the other two remaining Team USA athletes as a result. 'It was a lot of pressure, my heart was beating about a million miles an hour and I was on the verge of tears,' the gymnast shared. 'I just knew I had to do my...