Keywords: Toggle Diamond Sculls 04.jpg en Assembly room U12t 02 drift 1971 photograph on file Nuclear Testing Archive Las Vegas 1971 A Historical Evaluation of the U12t Tunnel Nevada Test Site Nye County Nevada Volume 5 http //www osti gov/bridge/product biblio jsp osti_id 1010604 DOE/NV/26383 “109 Federal Government of the United States PD-USGov Toggle Diamond Sculls |