I photographed a Northrop F-5B Freedom Fighter at the Pima Air Museum and F-5E Tiger II examples at the Evergreen Aviation Museum and Yanks Air Museum in Chino. The -A and -E models were single-seat versions, while the -B and -F models were two-seat versions. There are only two YF-5A prototypes left, one in Seattle and one in Dayton (both pictured below).