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Inside the Dugway Proving Ground (15 photos)

Getty Images photographer George Frey recently had the opportunity to visit the U.S. Army’s Dugway Proving Ground, a sprawling top-secret military facility in the Utah desert that tests and develops methods of working with  chemical, biological, radiological, and explosive hazards. Frey: “Workers at this facility handle some of the most deadly and dangerous biological and chemical agents on Earth.”