Members of the 28th Civil Engineer Squadron Explosive Ordnance Disposal Flight arrive at the memorial of Staff Sgt. Bryan Berky during 50th Anniversary EOD Memorial Day ruck march at Ellsworth, May 4, 2018. National EOD Memorial Day is designated by Congress as the first Saturday of May to honor of EOD technicians who lost their lives while conducting operations across the globe. (U.S. Air Force photo by Airman 1st Class Nicolas Z. Erwin)