A cadre of brilliant young scientists and an army of “hick girls” from the Oak Ridge, Tenn. area secretly processed uranium-235 used in the first atomic bomb dropped on Hiroshima at the close of World War II. Scores of FBI undercover agents watched almost every moved made by 100,000 atomic energy workers who reported to their jobs in a community that over night grew out of two farms, but wasn’t shown on any map during the Second World War.