A participant navigates an obstacle May 5 at Hill Air Force Base, Utah, during a mud run hosted by the 775th Explosive Ordnance Disposal Flight. The mud run was part of National Explosive Ordnance Disposal Day and EOD technicians from all across the west coast—along with civilian, active-duty and reserve personnel from Hill AFB—paid their respects with the blood, sweat and tears generated by effort focused on the event. (U.S. Air Force/R. Nial Bradshaw)