Abbey Road had the pleasure to perform at the Shrine of Democracy with the Air Force Heartland band on July 3rd, 2004. The event drew close to 30,000 and was shown on 3 Jumbo video screens throughout the park and even one (claming to be the largest in North America) in the parking lot. There aren't any photos of Abbey Road playing as I can't take pictures and play drums at the same time.
Click here for photos of the park Click here for photos of the fireworks