NELLIS AIR FORCE BASE, Nev.-- Airman 1st Class Timothy Bass, an engineering assistant with the 99th Civil Engineers Squadron Geo Base office, explains to a fifth grade class at Lomie G. Heard Elementary School how satellites orbiting the earth provide information to global positioning systems Nov. 17 as part of the annual Geography Awareness Week. 99th CES members shared their knowledge with students and explained the impact geographic information systems technology is making in our daily lives. (U.S. Air Force photo/ Lawrence Crespo)
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