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James Crawford, Ph.D. Senior Research Scientist for NASA, along with... News PhotoAir Pollution,Air Vehicle,Denver,Equipment,Horizontal,Month,NASA,Pollution,Science and Technology,Scientist,Senior Adult,USA,WindPhotographer Collection: Denver Post Copyright - 2014 The Denver Post, MediaNews Group.DENVER, CO - JULY 11: James Crawford, Ph.D. Senior Research Scientist for NASA, along with other scientist will start a month study on air pollution using satellites, aircraft, and a balloon loaded with equipment, July 14, 2014. The scientist and their equipment are set up on mesa above NREL in Golden. (Photo by RJ Sangosti/The Denver Post via Getty Images)