Graduating in 1970 with a degree in mechanical engineering, Danielle Wheelock lands a plum job at Mannheim Construction, Inc., in San Francisco. She moves into a group house on Haight Street, ground zero for the Summer of Love from 1967, and begins her career as a professional engineer. But her first assignment is more clerical than professional: tracking rebar shipments in the foundation of a nuclear power plant that Mannheim is building in Tennessee...