lolz. We haven’t developed an aircraft in public or in secret that represented a generational leap in aeronautical engineering in 70+ years, not since the Bell P-59 from 1942.
The F-117 and the B2 were both huge leaps forward in material science, but not aeronautics. The B2 is based on a design that dates back to just after WWII and the F-117 is a lumbering, clumsy ‘fighter’ that would likely lose to a 2nd gen fight in dog fight. There’s a reason both airplanes operate at night and that reason is once you can see them, they’re dead.
The craft that have been been observed optically and on radar and infrared systems from 2004 Nimitz incident represent a leap forward that dwarfs the technology delta between the Wright Brothers first airplane and the space shuttle. Whatever those things were, they weren’t built by this government or any government.
The last space shuttle mission was ten years ago in 2011.Now let me ask anybody here. Do you honestly think the US would abandon a program if we already didn’t have the technology of another mode of space flight. Now that doesn’t account for UFO sighting from decades ago, but I remember about something said by the head of our skunkworks a few years back. Basicly he said “ if you can think, we have already done it” that “we are a hundred years beyond what you see now”. Maybe they are ours, one day we will know.