U.S. Air Force Lt. Col. Warren Crabtree, outgoing 707th Maintenance Squadron commander, shares a light moment with the incoming 707th MXS commander Maj. Jessica Oberlander during the unit’s change of command ceremony at Barksdale Air Force Base, Louisiana, August 5, 2018. The 707th MXS is a nuclear certified unit and has adopted the nickname ‘Nuclear Rats’. (U.S. Air Force photo by Technical Sgt. Cody Burt/Released)