Tech. Sgt. Paul Willson, 341st Civil Engineer Squadron explosive ordnance disposal NCO in charge of quality assurance, inspects a 3-D printed mortar after a render safe training procedure was conducted Nov. 21, 2016, at Malmstrom Air Force Base, Mont. The EOD team is now using a 3-D printer to produce training aids that allow for realistic training without having to preserve them for future training. The training aids can now be made at a low cost, allowing more practical training and saving the unit hundreds to thousands of dollars each year. (U.S. Air Force photo/Airman 1st Class Daniel Brosam)