Season 7, Episode 41 Line of Defense
First Aired: December 19, 2000
An examination of historic defense systems includes the North American Aerospace Defense Command (NORAD); the Maginot Line in France; and the Atlantic Wall, built by Germany during World War II.
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- Premiered: December 10, 1993
- Rating: TV-PG
- Premise: Architectural and engineering landmarks of the 19th and 20th centuries. The programs previously aired on A&E's `Time Machine' series. Among the subjects: the Brooklyn Bridge, the Maginot Line, the Erie Canal, the Aswan Dam and the Trans-Siberian Railroad. (more)
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