U.S. Army Spc. Daniel Mitchell, a heavy vehicle operator with the 597th Transportation Brigade, 832nd Trans. Battalion, 688th Rapid Port Opening Element, performs preventative maintenance checks on a truck at Joint Base Langley-Eustis, Virginia, Sept. 16, 2019. The Soldiers of the 688th RPOE conduct preventive maintenance every week to ensure the unit’s vehicles are working properly. (U.S. Air Force photo by Senior Airman Derek Seifert)