From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide reads, "Total announced tests and radiation measured off the test range complex. Total above-ground tests = 126. Total sub0surface tests = 413. Total tests = 539. Number measured off the test range complex of above-ground tests = 89. Number measured off the test range complex of sub-surface tests = 40. Total number measured off the test range complex = 129."

Basement room of Boulder Dam Museum, showing a stairway and basement door in the southwest corner of the room.

Basement museum room, looking north, showing north corner of room. Boxes of materials are seen near the entrance doorway as light shines in from the windows.

Description given with photo: "Radar Installed on Passenger Planes Culver City, Calif. -- Radar safety control system (cabinet, left, center) for passenger planes, demonstrated by Howard Hughes in a trans-world airline plane, at Culver City, May 1st. Radar, with 500 and 2,000 foot warning signals, tells the pilot when he is approaching obstacles. Equipment is being installed in planes flying routes from San Francisco eastward to Shanghai. Credit (ACME) 5/3/47."