INDIAN SPRINGS, Nev. -- Roger Miller, a construction representative at the U.S. Army Corps of Engineers Los Angeles District's Creech Air Force Base office, observes as contractors perform a safety test on a hydrant at the Mission Control Center facility at the base. The facility will contain four buildings to support unmanned aerial vehicles around the world.

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Photo by: Daniel J. Calderon |  VIRIN: 120611-A-TV651-086.JPG