Staff Sgt. Jonathan Parker, lead mechanic, 3-349 Logistic Support Battalion, 85th U.S. Army Reserve Support Command and operationally controlled by First Army’s 177th Armored Brigade, troubleshoots the overheating of an observer coach/trainer Humvee. The heat can rise to more than 100 degrees at Camp Shelby which can cause Humvees to overheat during slow moving convoy operations. Turn-around time on vehicle repairs is fast since many of the Soldiers, working as mechanics, work in a similar capacity in their civilian lives. (U.S. Army Reserve photo by Sgt. David Lietz)