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Subject
- Radio--History--20th century.1
- Railroad trains--United States.1
- Seaplanes.1
- St. Patrick's Cathedral (New York, N.Y.)1
- Telegraph.1
- Tomb of the Unknowns (Va.)1
- Traffic congestion--New York.1
- Travel.1
- Tunnels.1
- United States Army.1
- United States Capitol (Washington, D.C.)1
- United States Capitol (Washington, D.C.)--Aerial film and video footage.1
- United States. Army. Signal Corps.1
- Washington (DC)--Buildings, structures, etc.1
- Waterfalls.1
- White House (Washington, D.C.)1