U.S. Air Force Chaplain (1st Lt.) Philip Nelson, a staff chaplain for the 181st Intelligence Wing, smiles while talking on a radio at Muscatatuck Urban Training Center, Ind., Aug. 14, 2021. Airmen from the 181st Chaplain’s Office supported exercise Homeland Defender, which is a joint domestic response exercise involving more than a dozen military and civilian emergency management agencies. (U.S. Air National Guard photo by 2nd Lt. Jonathan W. Padish)