After a five-year absence, Fair St. Louis brought back one of its most popular features this year: the air show over the Mississippi River. The show, which this year was held three times over the holiday weekend, features a variety of military and private aircraft, doing some pretty amazing tricks in front of the Arch grounds. For downtown workers, there’s a bonus: practice for the air show on the last work day before the fair opens. In this case it was Friday, July 2. I happened to have my camera that day, and I took a walk over to the Arch grounds during my lunch hour. Here’s a brief slideshow of some of the highlights.