Col. Michael Bartley, 99th Air Base Wing commander, Nellis AFB, along with Nevada Governor Jim Gibbons flip the switch to the North America's largest solar photovoltaic power plant located at Nellis Air Force Base, Nev., Dec. 17, 2007. The Solar Power System is a $100 million project, covering a total of 140 acres and providing over 14.2 megawatts of electricity. The Nellis Solar Power System will meet an average of 25 percent of Nellis' electricity requirements saving over $1 million dollars annually. (U.S. Air Force photo by Staff Sgt. Scottie McCord)