- Archival materials (61)
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- Aeronautics (45)
- Aeronautics, Military (35)
- WW II (28)
- Airplanes (8)
- Boeing B-29 Superfortress (7)
- Aeronautics, Commercial (6)
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- Curtiss C-46 Commando Family (2)
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- Fighter pilots (2)
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- North American P-51 Mustang Family (2)
- North American P-51D (F-51D) Mustang (2)
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- Martin (Glenn L.) MB-2 (1)
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- North American P-51C Mustang (1)
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- Pearl Harbor (Hawaii), Attack on, 1941 (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.