Ralph Nobles was one of three brothers to work on the Manhattan Project. He and his brother William worked at Los Alamos, while brother Robert was at the University of Chicago's Metallurgical Laboratory. During the Trinity test, Ralph helped operate data recorders. Ralph married Carolyn Fisher, who worked as a secretary at Los Alamos.
He went on to earn a PhD in physics and worked for many years at Lockheed Missiles and Space. He was also heavily involved in efforts to preserve San Francisco Bay.
For more information about Nobles' life and work, see Ralph Nobles dies; Manhattan Project physicist saved San Francisco Bay wetlands.