...you go to the Boeing Store in St. Louis and buy a hat with a North American Aviation logo on it. It does say Boeing on the back.
Before the Boeing Store, we went to the James S. McDonnell Prologue Room at Boeing’s St. Louis headquarters. It’s a one-room museum that chronicles the history of Boeing, Douglas and McDonnell. Tons of models and some really great old photos. It’s only open to the public three months out of the year, but it’s free.