Master Sgt. Tom Parrish, one of two hybrid vehicle

Master Sgt. Tom Parrish, one of two hybrid vehicle maintenance instructors at Volk Field, Wis., observes as Master Sgt. Rick Witkowski, of the Pennsylvania Air National Guard's 270th Engineering and Installation Squadron, and Staff Sgt. Manuel Gonzalez, of the New York Air National Guard's 109th Air Wing, prepare a 275-volt battery back for reinstallation into a Ford Fusion hybrid car during an Aug. 27 class on hybrid vehicle maintenance at Volk Field, Wis. Ten Air National Guard maintainers from across the country took part in the Air National Guard's first maintenance class for hybrid vehicles, held Aug. 25-29 at Volk Field. Hybrid cars are starting to enter the fleet of Air National Guard vehicles. Volk Field officials hope to offer the class on a quarterly basis. (Wisconsin Department of Military Affairs photo by Vaughn R. Larson)