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Oak Ridge historian Ray Smith speaks about a history of oppression and segregation against the African-American population there during the construction of ORNL and the Y-12 complex.
CALVIN MATTHEIS/KNOXVILLE NEWS SENTINEL

Adolf Hitler’s quest to build a master race drove European scientific talent into the United States’ ranks, giving the nation a jump-start on the race to develop the first atomic bomb.

But even as the United States held its arms open to immigrating…