The Ronald Reagan Ballistic Missile Defense Test Site, commonly referred to as the Reagan Test Site, is a missile test range in Marshall Islands. It covers about 750,000 square miles (1,900,000 km2) and includes rocket launch sites at the Kwajalein Atoll, Wake Island, and Aur Atoll. It primarily functions as a test facility for U.S. missile defense and space research programs. The Reagan Test Site is under the command of the US Army Kwajalein Atoll, or USAKA.