The main site for Lockheed Martin's Astronautics division is a 5,400-acre industrial site, with numerous production, test, and space simulation facilities, and over 70 laboratories. The Astronautics division designs and manufactures space launch vehicles, such as Titan and Atlas rockets; satellites, for communications and defense; and space probes, such as the Mars probe it built for the 1996 Jet Propulsion Lab Mars mission. Over 6,000 people work at this plant. Astronautics' administrative headquarters is five miles away at a 1,060-acre office complex called the Deer Creek Facility.