Aerial view of Lambert Field in 1925, looking southwest towards the town of Bridgeton, Missouri. The two large dark hangars in the foreground belonged to the 110th Observation Squadron of the Missouri National Guard. The elder Robertson brother, Bill, a World War I veteran, organized this National Guard unit in 1923 and was its first commander, with the rank of Major. This was first aviation National Guard unit in the state of Missouri, and one of the earliest in the entire country. Charles Lindbergh enlisted in the squadron in November of 1925 while he was developing the CAM-2 mail route for Robertson Aircraft Corp. During his time at Lambert Field, Lindbergh lived in a rooming house in the grove of trees in the top right part of the picture. The two round-roofed hangars in the background were built for the International Air Races held at Lambert Field in 1923. After the races these hangars eventually became part of the Robertson operations. The Robertson Aircraft Corp. offices are on the right, between the two groups of hangars, in front of the trees. Lambert Field's takeoff and landing area runs out of the picture to the left.