U.S. Air Force Staff Sgt. David Baumgartner, 9th Security Forces Squadron (SFS) K-9 handler, searches a vehicle for explosives with 9th SFS military working dog Elma during military working dog detection training on Beale Air Force Base, California, Nov. 19, 2020. The sweep was part of mass odor training meant to prepare both the dogs and the handlers to detect large quantities of explosives. Without training similar to this, the amount of odor produced by the explosives overwhelms the dog’s smell, resulting in either fringe responses or responding before the vehicle stops at the checkpoint.(U.S. Air Force Photo by Airman 1st Class Jason W. Cochran)