This just popped up over my house today. I couldn't hear or see any planes. I'm sure somebody is taking a pot shot at Tiger Woods. I couldn't get all of the message since they done it in a circle. I wish I could have got video of this as it happened really fast. If it was planes I don't see how they got away with it since it is right in the flight path of O'Hare.
The other part I didn't get said something like " We believe" and I couldn't read the rest.
This technology existed at least 50 years ago. It was probably a more mechanical system but the idea was the same. Personally I like the messages that were written by a single airplane and pilot (usually a bi-plane) "back in the day". J