"The atmosphere at Oak Ridge was as heavy with mystery as a dime detective novel, and up to the bombing of Hiroshima few G.I.s working there knew the purpose of their secret job".
The research and development spanned the years 1942 through 1946 and the participating nations behind the effort were the Unites States, Great Britain and Canada. Within the United States, there were as many as three locations where the Manhattan Project was carried out however this article concerns the goings-on at the uranium-enrichment facilities in Oak Ridge, Tennessee.