- Aeronautics (5)
- Aeronautics, Military (3)
- Air pilots (2)
- World War, 1939-1945 (2)
- Aeronautics and state (1)
- Aeronautics, Commercial (1)
- African American air pilots (1)
- Flight training (1)
- Naval aviation (1)
- Periodicals (1)
- Prisoners of war (1)
- SPAD XIII (S.13) "Smith IV" (1)
- United States Marine Corps (1)
- Works of art (1)
- World War, 1914-1918 (1)
Our collections specialists actively work on the conservation, preservation, restoration, and long-term care of the objects in our collection. From full-scale restoration projects to applying preservation techniques and doing regular assessments, these activities form a crucial part of our stewardship of the National Collection.