Tech. Sgt. Christopher Poole, 455th Maintenance Group engine manager, informs Staff Sgt. Christopher Contreras, 455th Aircraft Maintenance Squadron C-130 maintainer, what parts of an engine need to be cleaned, prior to a customs inspection on Bagram Airfield, Afghanistan, May 13, 2012. Poole is deployed from Barksdale Air Force Base, La. (U.S. Air Force photo/ Staff Sgt. Stephenie Wade)