Senior Airman Brian Heimgartner, an aircraft mechanic from the 374th Aircraft Maintenance Squadron at Yokota Air Base, Japan, loosens a casing of a C-130 Hercules to check an engine oil leak at Halim AB, Indonesia, during Cope West 10 on April 22, 2010. Cope West is a Pacific Air Forces sponsored bilateral tactical airlift exercise involving U.S. and Indonesian air forces. The exercise is designed to advance interoperability between U.S. and Indonesian air forces, and promote cooperation and unity of purpose. The C-130 is from Yokota AB. (U.S. Air Force photo/Tech Sgt. Cohen A. Young)