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(Courtesy of Iron County Sheriff’s Office) The remains of an explosive-filled bunker found during the Brian Head fire in sum... (Courtesy of Iron County Sheriff’s Office) An explosive-filled bunker found during the Brian Head fire in summer 2017. (Courtesy of Iron County Sheriff’s Office) The remains of an explosive-filled bunker found during the Brian Head fire in sum... (Courtesy of Iron County Sheriff’s Office) The remains of an explosive-filled bunker found during the Brian Head fire in sum... (Courtesy of Iron County Sheriff’s Office) An aerial view of an explosive-filled bunker found during the Brian Head fire in ... (Courtesy of Iron County Sheriff’s Office) The remains of an explosive-filled bunker found during the Brian Head fire in sum...