Photograph of Grover Whalen, Howard Hughes, and Al Lodwick during a parade procession for the completion of Hughes' Round-the-World flight.

Photograph of Grover Whalen, Howard Hughes, and Al Lodwick during a parade procession for the completion of Hughes' Round-the-World flight.

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."

Picture of Grover Whalen, Howard Hughes, and Al Lodwick riding in the back of an automobile during a parade celebrating Howard Hughes' completion of his round-the-world flight.

Picture of Grover Whalen, Howard Hughes, and Al Lodwick riding in the back of an automobile during a parade celebrating Howard Hughes' completion of his round-the-world flight.

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"