Howard Hughes (right) with unidentified man before the flight of the second XF-11 prototype, April 4, 1947.

Howard Hughes waving to crowds in a parade in Houston, Texas in 1938.

A view of Howard Hughes installing a radar safety system for passenger planes in Culver City, California.

A view of Howard Hughes' Flying Boat being prepared for a test run in Long Beach, California.

Typed onto a piece of paper attached to the image: "As Hughes Visited Washington To Thank Cordell Hull, Washing, D. C. -- Police escorting Howard Hughes holding hat, through the admiring throungs at the Washington Airport as the intrepid flyer and his four companions on his Round-The-World flight came to the Capital, July 21st, to personally thank Secretary of State Cordell Hull for his cooperation in clearing their take-offs on their flight. Credit Line (ACME) 7/21/38."

Description given with photograph: "Howard Hughes in New York after making a high altitude flight from Los Angeles during which he tested a new two-ounce oxygen mask."

A view of Howard Hughes attending an informal press conference in Culver City, California, after Hughes left the Senate War Investigating Subcommittee hearing in Washington.