In early 2004, Mission Research was acquired by Alliant Techsystems Inc. (ATK). Mission Research Corporation was a privately owned research and development company developing antennas, instrumentation, radar systems, sensors, measurement equipment, and computer chips, among numerous other activities -- such as researching the effect of nuclear weapons on the atmosphere. Major customers of the employee-held company include three branches of the US military, NASA, Los Alamos National Laboratory, and the US Department of Energy. Mission Research operates research facilities in 18 US locations almost all of which are close to military facilities.