I found another interesting thing: "Aerospace Epicenter
Tucson International Airport is the epicenter for the local aerospace sector with 11,500 employees, upward of half of the aerospace jobs here. Raytheon, Bombardier Aerospace, Ascent Aviation Services (the former Hamilton Aerospace), the Arizona Air National Guard’s 162nd Fighter Wing and SkyWest Airlines’ maintenance center and crew domicile are all based at TIA."