From what I can gather about the German Flying Saucers,
is that they did not get captured by the Russians or the
Americans - but that a small group of Nazis escaped with
them to South America ... or so the story goes.
Only to turn up in the 50s' at the time of Adamski, and
other times their particular type of saucer design -
photographed.
Gathering proof of this isn't easy...

impossible more likely because it's not true?
the germans did not even have an a-bomb,but they had a flying  saucer ?
wich is a thousand times more difficult to make when regarded the amount of energy needed to hover and fly such a machine.