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- United States. Army. Air Corps.[remove]5
- United States. Air Force.4
- Aeronautics.3
- Air mail service--United States.2
- United States Postal Service.2
- Aeronautics, Military.1
- Air mail service.1
- Ballooning.1
- Balloons.1
- Brown, Walter F. (Walter Folger), 1869-1961.1
- Dern, George Henry, 1872-1936.1
- Douglas DC-2 (Transport plane)1
- Foulois, Benjamin Delahauf, 1879-1967.1
- Heroes.1
- Lindbergh, Charles A. (Charles Augustus), 1902-1974.1
- McCarran, Pat, 1876-1954.1
- Military ceremonies, honors, and salutes.1
- National Geographic Society (U.S.)1
- Nevada.1
- Rickenbacker, Eddie, 1890-1973.1