Arizona is home to over twelve hundred aerospace and defense contractors, from major industry leaders to the small mid-size suppliers, as well as ten military installations: six major active-duty installations (Davis-Monthan Air Force Base, Fort Huachuca, Luke Air Force Base, Marine Corps Air Station – Yuma, Yuma Proving Grounds, and US Naval Observatory – Flagstaff Station) and four National Guard facilities in central, northern, and southern Arizona. These operations create and support over ten thousand jobs and generate nearly $11.5 billion in economic impact to our state economy from the facilities themselves and other economic activity generated by their presence.