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Clinton failed to bomb the wreckage. A gift to his socialist handlers.

Probably not that much of a gift. The F-117 was very early Stealth technology, based on heavy use of faceting and 1970s/80s-era RAM (radar absorbent material). The "J-20" looks nothing like the F-117 (it looks almost exactly like the CALF demonstrator, see above), and if it uses reverse-engineered RAM technology the US is already at least 2-3 generations beyond that.

IIRC the most "complete" section of the shot-down F-117 was the canopy, which contained RAM-impregnated (gold-based) transparencies to limit the return from the pilot's head/helmet. But again, the F-117 canopy was designed with highly faceted-stealth, NOT what the US is currently using or what can be observed in the "J-20".

My conclusion would be that there was very limited tech transfer from the lost F-117. The tech that WAS transferred is now obsolete, and the US KNOWS how to counter it. The "J-20" may contain some of that tech (specifically the 70s/80s-era RAM, but not the heavy faceting) and this may explain the apparent fact that some F-117s are still flying out of Tonopah in a "Red Force" (oppositional training) capacity.