The Top-Secret Aurora spy plane, a.k.a. XR-7 Thunderdart and SR-75 Penetrator. This plane has been kept secret since the 1980s, flying out of Edwards air Force Base and Area 51. We don't know the capabilities, but we have evidence it might be able to go to speeds higher than Mach 6. It might be the replacement of the SR-71 Blackbird. #7 #75 #79 #area_51 #Aurora #Chris #donuts_on_a_rope #donutsonarope #Gibson #groom_lake #hypersonic #Mach_6 #North_Sea #plane #secret #sighting #sonic_boom #spy #SR #supersonic #UFO #XR
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