F-102A Delta Dagger - part of the Century Series (F-101 F-4) and the 1st operational supersonic US jet fighter. It also had an internal weapons bay. When retired it was fitted out QF-102 Full Scale Aerial Target (FSAT) drone.
Northrop A-9A under evaluation by the Air Force to be its new tank-buster. It lost out to Fairchild Republic's A-10 Thunderbolt. (It's interesting how similar the Soviet's Su-25 Frogfoot design is to the A-9.)
Twin Beech 18 crazy twist Built in 1943 by the Beechcraft Corporation in Wichita, Kansas. Bought new by the United States Army Air Corps and severed as a navigation trainer and then served in the Civil Aeronautics Administration as VIP transport until 1949. Now it's the flagship of the Younkin Airshow. (firstname.lastname@example.org)