Imagine This: A Mach 6 SR-71 Blackbird (That Has Strike Capabilities) Lockheed’s Skunk Works, which created the A-12/YF-12/SR-71 family, is now developing a SR-72 Kris Osborn · September 24, 2018 Please leave this field emptyStay Updated with Warrior Maven Subscribe for daily military news and updates delivered straight to your inbox. We don’t spam! Read our privacy policy for more info. Check your inbox or spam folder to confirm your subscription.