Their average age was 25. They came from Berkeley, Cambridge, Paris, London, Chicago - and arrived in New Mexico ready for adventure, or at least resigned to it. But hope quickly turned to hardship as they were forced to adapt to a rugged military town where everything was a secret, including what their husbands were doing at the lab. They lived in barely finished houses with P.O. box addresses in a town wreathed with barbed wire, all for the benefit of a project that didn’t exist as far as the public knew.