My favorite TV channel (the History Channel) is airing a program called Modern Marvels that is highlighting flight as it has evolved to the extremes from the X-1 series
The crescendo is th US F-22 Raptor fighter jet. This thing is amazing itself. But, what I have found far more interesting is the R&D (previously classified) that sounded strangely familiar. For the last 2-3 decades the govt including NASA has been working with thrust vectoring and hypersonic aircraft. The F-15 was the first highly successful aircraft that could employ this technology.
The aircraft would travel at high speed and make absolute directional changes and quickly return to mach speeds. The video shows these maneuvers up close. The aircraft uses afterburners which have a high visibility from a distance, say, the ground.
What one would see on the ground is a bright light racing across the sky. Then a sudden slowing. A near 90 degree turn and then an abrupt return to mach.
Sound familiar?
The F-22 does not have visible afterburners but employs the same technology giving a slightly different appearance to ground based observers.
The program also speaks about the 2 protos that crashed. They employed an adhered linoleum type radar absorbing material.
X-1
X-33
UFOs in Iraq
F-15