Weaver assumes command of 412th MXG Published July 13, 2011 By 95th Air Base Wing Public Affairs EDWARDS AIR FORCE BASE, Calif. -- Col. Robert Weaver assumes command of the 412th Maintenance Group at a change of command ceremony in Hangar 1600 July 8. Fresh from the Air War College at Maxwell AFB, Ala., Weaver replaced Col. Mary Hixon who has moved on to Scott AFB, Ill.