Four 84th FIS F-106 Delta Darts refuel from a Boeing KC-135A Stratotanker in this 1976 photo. The 84th relocated to Castle AFB from Hamilton in 1973 but kept its squadron designation and color scheme. That KC-135 is probably from the Combat Crew Training School at Castle, where all SAC KC-135 and B-52 crew members received their initial and follow-on training. Castle closed in 1995. [http://hamiltonafbhistory.multiply.com/photos/album/13/Hamilton-Scenes#photo=34]