Strange Cloud

I got these photos from Abe Barker. I met him and his copilot (?) at the Congress St. Bridge in Austin TX. They'd flown some people in and were checking out the bats.

We got to talking and they mentioned having some crazy shots of the shuttle from 20,000 feet and a really odd white cloud that formed shortly thereafter. Abe was kind enough to email me the photos so I'm putting them up in case they interest anyone else.