 The Spanish Air Force acquired its first batch of ex @-@ USAF F @-@ 4C Phantoms in 1971 under the " Peace Alfa " program . Designated <unk> , the aircraft were retired in 1989 . At the same time , the air arm received a number of ex @-@ USAF RF @-@ 4Cs , designated <unk> In 1995 – 1996 , these aircraft received extensive avionics upgrades . Spain retired its RF @-@ 4s in 2002 . 
