Howard Hughes in the cockpit of his XF-11 airplane before his first test flight.

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). Hearings for individuals arrested at the Lenten Desert Experience.

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."

Preliminary drawing of front exterior elevation of ra anch-style residential home in Boulder City, Nevada. Handwritten near lower right: "Elevations only for Plan 1 (1B, 1C, 1D), Plan 2 (2B, 2C, 2D), Plan 4 (4B, 4C, 4D), Plan 5 (5B, 5C, 5D)."

Architecture Period: Mid-Century Modernist

Description given with photo: "Hughes Pilots Radar-Equipped Plane Culver City, Calif. -- First passenger plane equipped with radar is flown in demonstration May 1st by Howard Hughes (left) and co-pilot R.C. Loomis over Culver City. Pilots using this equipment will be warned of approaching obstacles by lights flashing on radar panel. Two lights (lefts) with 2,000-foot range, are used to guarantee clearance over mountains; two lights (right) with 500-foot range, are a safety device for approaches and landings. Either set of lights warns against approaching aircraft. Trans-World Airline plans to install radar on its passenger planes. Credit (ACME) 5-3-47."

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide reads, "Off-site radiation exposure review project organization chart"

From the Sister Klaryta Antoszewska Photograph Collection (PH-00352). The presentation slide title reads, "Underground nuclear test execution sequence"