Staff Sgt. David Mainor (second from left), 512th Civil Engineer Squadron engineer assistant, displays his Diamond Sharp Award presented to him by Master Sgt. Clifford Bailey (left), the 512th CES first sergeant, Feb. 10, 2013,on Dover Air Force Base, Del. The award recognized Mainor's service and dedication to the performance of his duty and support of the civil engineer mission. Chief Master Sgt. William T. Wild III, the 512th Airlift Wing Command Chief and two other first sergeants also attended the presentation. (U.S. Air Force photo/Staff Sgt. Karista Laise)