Up in the sky!

Back in October (I know, I have some catching up to do), Austin came running inside from the back yard exclaiming that there were letters in the sky. He was right. Unfortunately, it wasn't anything too interesting. These were made by planes flying together turning on and off their smoke to make "digital" letters. They were intended to be read by fair goers at the NC state fair. Kinda cool. I wonder if all that is automated or if they have to manually turn the smoke on and off.

And BTW, the image isn't inverted, I guess it's supposed to be ready by people further south, looking north.