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Subject
- Biplanes.[remove]9
- Bombers.[remove]9
- Aeronautics, Military.8
- United States. Army. Air Corps.7
- Smoke screens.5
- Airplanes.1
- Bombing, Aerial.1
- Bombs.1
- Curtiss-Wright Corporation.1
- Explosions.1
- Military art and science.1
- Motion picture journalism--United States--History.1
- Movietonews (Firm)1
- Soldiers--United States.1
- United States. Army.1
- United States. Marine Corps.1
- Weapons.1