Congratulations to D-M's newest lieutenant colonel selects!Maj. Bryan Bobeck, 355th Equipment Maintenance SquadronMaj. Amanda Brandt, 12th Air ForceMaj. Octavio Echevarria, 79th Rescue SquadronMaj. Steven Ketchum, 355th Operations Support SquadronMaj. Sean Lowe, 612th Air and Space Operations