McDonnell F-4D 'Phantom II' flown by The Happy Hooligans from the NDANG at Hector Field, Fargo, ND.
Photo by Bob Nelson

The USAF initially flew its F-4D 'Phantom II's with a rated Air Force Pilot in front and back seats. While the rear pilot could fly and ostensibly land the aircraft, he had fewer flight instruments and a very restricted forward view. The Air Force later assigned a rated Air Force Navigator qualified as a weapon/targeting systems officer (later designated as weapon systems officer or WSO) in the rear seat instead of another pilot. However, all USAF Phantoms retained dual flight controls throughout their service life. -wiki