Before Southern California gave the world McDonald’s, Disneyland, and Trader Joe’s, we were really good at making airplanes. The Santa Monica Airport is marking the centennial of the the first-ever flight around the world with Douglas Day this Sunday. The first air show in the United States was held near Compton in 1910 a little over six years after the Wright Brothers’ first flight. Northrop, Lockheed, and North American Aviation/Rockwell International all have roots near L.A., as seen in the Oscar-winning film Wings (1927), which made flying look sexy. Angeleno…..