U.S. Army Spc. Stiven Rosales and U.S. Army Master Sgt. Ryan Thiers, both wheeled vehicle mechanics assigned to 21st Theater Sustainment Command, troubleshoot an Army cargo truck at the Daenner Kaserne Motor pool Dec. 18 in Kaiserslautern, Germany. The assigned mechanics are responsible for maintaining vehicle mobility by troubleshooting, fixing and maintaining roughly 60 vehicles at the motor pool.