Air Combat Command officials announce the following senior officer assignments:Col. Michael R. Moeller, commander, 2nd Bomb Wing, Barksdale AFB, La., will become deputy commander, Plans and Programs, Headquarters Air Combat Command, Langley AFB, Va.Col. Daniel J. Charchian, vice-commander, 5th Bomb Wing, Minot AFB, N.D., will become commander, 2nd