The largest such spectacle in the world, the Chicago Air and Water Show draws over three million people to the lakeshore for a weekend of low-key beach leisure and high-powered entertainment. Gerry and Janet Souter climb into the cockpit (and occasionally lean precariously out of it) to log the extravaganza's fascinating history. Even before the event became a beloved annual tradition half a century ago, visitors to the lakeshore had been treated...