Don Bartel with German Shepherd, Major, by Nordeck, Diane, 1994, Smithsonian Archives - History Div, Don Bartel, trainer for the Smithsonian Institution's Office of Protective Services K-9 Unit, with Major, one of the K-9 Unit's finest. The first class, 6 dogs of German Shepherd descent, of the Smithsonian Canine Unit graduates at ceremonies held at the canine training grounds of Andrews Air Force Base on June 25, 1975..