Circular bright UFO taken over Phoenix, Arizona

On July 29, 2016, an automobilist took photo of storm while driving home. After the fact, he realized he had captured a circular-shaped UFO over Phoenix, Arizona, USA.

Witness report:

A friend sent me these photos. Taken in Arizona while driving on the freeway. Did not see object in question until later when looking at the photos at home. Was initially taking picture of the storm clouds. This is all I know. I am sharing because I believe these photos to be real.