Gunnery Sgt. Phillip Walkoviak, left, an Explosive Ordnance Disposal technician with Marine Wing Support Squadron 372 from Marine Corps Base Camp Pendleton, Calif., and Staff Sgt. Robbie Grieder, the range officer-in-charge and an EOD technician team leader with Headquarters & Headquarters Squadron at Marine Corps Air Station Yuma, Ariz., and a native of Belleplaine, Iowa, prepare unexploded ordnance to be detonated during range clearance operations at the Chocolate Mountain Aerial Gunnery Range, Calif., Monday, Aug. 25, 2014. - Gunnery Sgt. Phillip Walkoviak, left, an Explosive Ordnance Disposal technician with Marine Wing Support Squadron 372 from Marine Corps Base Camp Pendleton, Calif., and Staff Sgt. Robbie Grieder, the range officer-in-charge and an EOD technician team leader with Headquarters & Headquarters Squadron at Marine Corps Air Station Yuma, Ariz., and a native of Belleplaine, Iowa, prepare unexploded ordnance to be detonated during range clearance operations at the Chocolate Mountain Aerial Gunnery Range, Calif., Monday, Aug. 25, 2014.