Filling in
ELMENDORF AIR FORCE BASE, Alaska -- Maj. Scott Tagg checks the daily blotter from his office. Major Tagg is an individual mobilization augmentee, a Reserve officer matched against the commander position for the 3rd Security Forces Squadron. When the active-duty servicemember is deployed or temporarily away, an IMA can step in to backfill that position to ensure the unit continues operating normally. (U.S. Air Force photo by Senior Airman Austin May)