Edwards Air Force Base Edwards Air Force Base Edwards Air Force Base (AFB) is a United States Air Force installation located in Kern County in southern California, about northeast of Lancaster and east of Rosamond. It is the home of the Air Force Test Center, Air Force Test Pilot School, and NASA's Armstrong Flight Research Center. It is the Air Force Materiel Command center for conducting and supporting research and development of flight, as well as testing and evaluating aerospace systems from concept to combat. It also hosts many test activities conducted by America's commercial aerospace industry. Previously known as Muroc Air Force Base,
Johnston Island Air Force Base and water production at the base and built additional facilities. The 5th Battalion departed in January 1943. In December 1943 the 99th Naval Construction Battalion arrived at the atoll and proceeded to lengthen the runway to and add an additional of parking to the seaplane base. US Navy and Marine units based at Johnston included: US Navy and Marine units based at Johnston included: Johnston Island Air Force Base Johnston Island Air Force Base is a former United States Air Force base on the Johnston Atoll in the United States Minor Outlying Islands, in the Pacific Ocean several hundred kilometers