EntityQ1469336· pop 22· linked from 344 articlesLockheed YF-12Sign in to saveAmerican prototype interceptor aircraftConnectionsArea 51EntityLockheed AH-56 CheyenneEntityConvair F-106 Delta DartEntityLockheed A-12EntityWright-Patterson Air Force BaseEntityNational Museum of the United States Air ForceEntityLockheed VenturaEntityAIM-47 FalconEntityUnited StatesCountryUtahEntityNASAConceptLyndon B. JohnsonPersonVietnam WarConceptInternational Standard Book NumberEntityCentral Intelligence AgencyEntityWayback MachineEntityDaytonEntityUnited States Air ForceEntityGeneral Dynamics F-16 Fighting FalconEntityLockheed Martin F-22 RaptorEntityCategories1960s United States fighter aircraftAircraft first flown in 1963Aircraft with retractable tricycle landing gearCancelled military aircraft projects of the United StatesLockheed aircraftLow-wing aircraftNASA aircraftTailless delta-wing aircraftThird-generation jet fightersTwinjets