Re: Russia's Stealth Fighter
The Soviets (er, excuse me, Russian Confederation) are no slouches.
As for imitation, it is not only the sincerest form of flattery, it can go some pretty decent way toward suggesting fruitful directions for development. Far from the first time, this imitation in aerospace applications may have superficial similarities, but a lot of what makes our ordnance effective can't be seen on the surface. While our core approaches to effective aircraft has been superficially different, the Russians have employed divergent concepts with considerable success.
We are not the only ones on the planet to have gotten the square peg/round hole challenge right. As the Russians themselves have said in the past, successful solutions to specific universal problems tend to look similar on the outside.
From the TU-144 to the Buran Shuttle, getting it looking similar on the outside is no guarantee that the damned thing actually works in the end.
However, when Sukhoi is involved, things tend to be pretty nifty.
Greg