Graduate denied diploma for dancing at Philadelphia high school ceremony

A high school graduate in Philadelphia was denied her diploma on stage for dancing during her graduation ceremony. The incident was captured on video and the principal has been identified as Lisa Mesi. The graduate said the principal warned students their families could not cheer or clap when they walked on stage and it was the laughter from the crowd that led to the principal's refusal. The school has apologized for the incident and is looking into the matter to avoid it happening in the future.