ARIZONAGrand Canyon uranium warning slide showCourtesy of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephonsonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.N/AThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephensonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston StephonsonThis is part of a 45-slide presentation from the safety manager at the Grand Canyon National Park that documented the radiation exposure and findings.Courtesy Of Elston Stephenson