457th AS welcomes new commander Published June 26, 2018 By Tech. Sgt. Coty Hewlett 457th Airlift Squadron JOINT BASE ANDREWS, Md. -- Col. Kevin Schiller, 375th Operations Group, presents the squadron guidon to Lt. Col. Royce M. Lippert, 457th Airlift Squadron commander, during a change of command ceremony on Joint Base Andrews, Maryland, June 22. The 457th AS is a geographically separated unit that flies the C-21 out of JB Andrews. Its mission is to provide safe and reliable airlift support to distinguished visitors including high-ranking generals, Department of Defense civilian leaders, Congressmen, cabinet members, and, at times, foreign nationals.