U.S. Air Force 1st Lt. Arthur Yencho, 824th Base Defense Squadron flight commander, demonstrates grenade throwing in a prone position at Moody Air Force Base, Georgia, Oct. 20, 2021. The grenade training is a competency qualification course to ensure Airmen know how to accurately throw and handle grenades before handling live explosives. (U.S. Air Force photo by Airman 1st Class Megan Estrada)