asd is responsible for the design, development and acquisition of aeronautical systems including transports, tankers and utility aircraft, rescue helicopters, long- and short-range air-to-surface missiles, aircraft engines and electronic warfare systems. in addition, the wing supported programs conducted by other afmc departments. the majority of afmc's large transport aircraft were assigned to the 4950th test wing and were loaned to other agencies as required. the 4950th test wing operated a variety of testbed c-135s, many of which have featured major modifications. the wing was consolidated with the afmc flight test center's 412th test wing at edwards afb, ca and inactivated in 1994.