- Aeronautics (3)
- Aeronautics, Military (2)
- Aeronautics, Commercial (1)
- Air defenses (1)
- Air mail service (1)
- Air pilots (1)
- Airports (1)
- Balloons (1)
- Curtiss NC-1 (P2N-1) (1)
- Curtiss NC-4 (P2N-1) (1)
- Curtiss NC-Boat Family (1)
- Helicopter transportation (1)
- Helicopters (1)
- Periodicals (1)
- Seaplanes (1)
- Transatlantic flights (1)
- World War, 1939-1945 (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.