Tech. Sgt. Zachary Michalski uses a borescope to inspect a turbine.
U.S. Air Force Tech. Sgt. Zachary Michalski, with the 164th Expeditionary Air Squadron, 25th Combat Air Battalion, uses a borescope to inspect a turbine on the engine of a C-130 Hercules cargo plane at Contingency Operating Base Speicher, Iraq, on Nov. 11, 2009.