Hillary Clinton Is Being Treated for Pneumonia, Leaves 9/11 Ceremony Feeling ‘Overheated’.

VIDEO: https://youtu.be/kHwCaGPyHUE

Hillary Clinton appeared to stagger and faint in footage showing her early exit from a 9/11 commemoration ceremony on Sunday, though Clinton's doctor said the episode was a result of heat and dehydration.

Democratic presidential candidate Hillary Clinton attends the 2016 ceremony at the Sept. 11 memorial in New York.

The Democratic presidential nominee fell on her way into her van and had to be helped by her security, according to witnesses and video of her leaving. She was “clearly having some type of medical episode," a law enforcement source told Fox News.

After more than an hour of radio silence, Clinton's campaign issued a statement saying the former Secretary of State "felt overheated," and later Sunday issued another release blaming the episode on pneumonia and dehydration.'