David Jaramillo, 576th Aerospace Maintenance and Regeneration Squadron aircraft mechanic, installs a portion of the heat exchange on an A-10A Thunderbolt on Davis-Monthan Air Force Base, Ariz., Jan. 23, 2013. Jaramillo and other members of the 309th Aerospace Maintenance and Regeneration Group are working to ensure the aircraft is safe and ready to fly. (U.S. Air Force photo by Senior Airman Timothy Moore/Released)