USA alternate athlete Anna Li has injured during training in Birmingham on Tuesday. 

From USA Gymnastics, July 26, 2012

Anna Li Update

When Anna Li fell from the uneven bars on July 24, she injured her neck and is wearing a cervical collar as a precaution.  She tore a ligament in her neck, and she has been advised to wear the collar as well as check with a physician upon her return to the States.  As a result, she is no longer training as a replacement athlete.