TYNDALL AIR FORCE BASE, Fla. – A C-17 Globemaster III, P-223, flies over Joint Base Charleston, South Carolina. The Defense Logisics Agency Energy recently released a notice of opportunity for an energy savings performance contract at the base. The proposed scope of the ESPC includes 121 Naval Weapon Station buildings and 461 parking and streetlight fixtures. (U.S. Air Force photo/Senior Airman Dennis Sloan/Released)