The 4950th Test Group (Nuclear) is an inactive United States Air Force unit. It was last was assigned to Air Force Special Weapons Center, stationed at Kirtland AFB, New Mexico. It was inactivated on 16 August 1961. The mission of the unit was to serve as a permanent United States Air Force Air Task Group for atmospheric testing. With the phase-down of atmospheric testing activities as a result of the 1958 moratorium between the United States and Soviet Union, in August 1961 the unit was disestablished