File:2-cent Aeronautics Conference 1928 U.S. stamp.1.jpg
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![File:2-cent Aeronautics Conference 1928 U.S. stamp.1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/2-cent_Aeronautics_Conference_1928_U.S._stamp.1.jpg/800px-2-cent_Aeronautics_Conference_1928_U.S._stamp.1.jpg?20140530202048)
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Categories:
- 1928 stamps of the United States
- Aircraft on stamps of the United States
- Red stamps
- U.S. historical landmarks on stamps
- Washington, D.C. on stamps
- Washington Monument on stamps
- United States Capitol on stamps
- United States Capitol in the 1920s
- Washington Monument in the 1920s
- International Civil Aeronautics Conference
- Wright brothers aircraft on stamps