Senior Airman Nick Vogel (left) watches and learns as Senior Airman Matthew Bujanauski replaces a duct in the air conditioning bay of a U.S. Air Force F-15 Eagle at Korat Royal Thai Air Force Base, Thailand, March 9, during exercise Cope Tiger 2010. Both Airmen are from the 19th Aircraft Maintenance Unit at Elmendorf Air Force Base, Alaska, and are participating in Cope Tiger 2010, a multilateral aerial large-force exercise involving U.S., Singaporean and Thai air forces. The exercise enhances combined readiness and interoperability between the United States and countries throughout the Asia-Pacific region. (U.S. Air Force photo/Capt. Christy Stravolo)