sentences:  AMC activated the unit on 1 June 1992 as the 458th Operations Group to control its two McDonnell Douglas KC-10 Extender tanker squadrons at Barksdale.The group was assigned to the 22d Air Refueling Wing at McConnell Air Force Base, Kansas.From 1 October 1993 until it was inactivated on 1 April 1994, the 71st Air Refueling Squadron, flying Boeing KC-135 Stratotankers was also briefly assigned to the group.