German scientists that helped the US, to whatever extent they helped the US, did help to preserve our civilization, even if they tried to destroy it during the war. But let's ignore them; I'm talking about the thousands of American scientists and engineers worked on defense applications in the 20th century, and to some extent about those of Britain, Canada, France, and so forth.
No he wasn't; he was just an ally. The term "western allies" excludes the Soviet Union, that's why I intentionally chose it: http://en.wikipedia.org/wiki/Western_Allies
German scientists that helped the US, to whatever extent they helped the US, did help to preserve our civilization, even if they tried to destroy it during the war. But let's ignore them; I'm talking about the thousands of American scientists and engineers worked on defense applications in the 20th century, and to some extent about those of Britain, Canada, France, and so forth.