ELLSWORTH AIR FORCE BASE, S.D. — (Left) Staff Sgt. Patrick Heltne, 28th Civil Engineer Squadron explosive ordnance disposal journeyman, observes (right) Staff Sgt. Darryl Wilcken, 28th CES explosive ordnance disposal journeyman, wrap detonation line, March 30. Sergeant Wilcken is demonstrating the proper technique to wrap a detonation line. (U.S. Air Force photo/Senior Airman Adam Grant)