Corporal Diego Castaneda, a motor transportation maintenance chief serving with Golf Battery, 2nd Battalion, 11th Marine Regiment, grabs a wrench from his tool kit before working on a 7-ton truck during Exercise Desert Scimitar, a combined-arms, live-fire training exercise here, May 3, 2013. Castaneda, a native of Gibbon, Neb., is the only mechanic in the battery and is in charge of keeping more than 40 vehicles properly maintained and running. Captain William Turner, the commanding officer of Golf Battery, said thanks to Castaneda's devotion and hard work, the battery is one of the few in 11th Marines that can commute to and from the Combat Center without vehicles breaking down.