Several M109A6 Self-Propelled 155mm Howitzers pound the skies over Fort Knox June 11, 2021, during a special live-fire exercise performed for former members of 2nd Battalion, 138th Field Artillery (Paladin). About 50 members joined the unit to witness the Paladin’s strength and share some of their stories of the past. (Image capture of video by Kyle Hodges, Fort Knox Public Affairs)