Casey Keehn, 97th Air Mobility Wing plans representative, turns off a light when exiting an office in building 87 Sept. 1. "Turn it off" messages are placed near light switches around Altus Air Force Base, Okla., to remind building occupants to help save energy. Altus recently won $1 million by placing second in the Air Education and Training Command Energy Incentive competition. Altus reduced its energy intensity by 13.3 percent from July 2008 to July 2009. (U.S. Air Force photo/Senior Airman Cherice Bryant)