Col. Cal Mercer (left), the vice wing commander of the 436th Airlift Wing, presents Staff Sgt. Charles Christman, an aircraft structural maintenance craftsman with the 436th Maintenance Squadron, with the 2010 Air Force Lt. Gen. Leo Marquez Award in the Aircraft Maintenance – Technician Supervisor category Aug. 2, 2011, at Dover Air Force Base, Del. This award is presented to members who have demonstrated the highest degree of sustained job performance, job knowledge, and job efficiency in the categories of aircraft, munitions and missile, and communications. (U.S. Air Force photo by Steve Kotecki)