Modern Marvels
Season 7 Episode 38 - Line of Defense
Fortification evolved as man tried to defend his territory from attack. From fenced-in hills to walled cities to impenetrable forts, strongholds of the past echo the history of battles for territorial control. In a 2-hour special, we examine various historical defenses, including France’s Maginot Line, a defensive string of forts with enfilading firepower; the Atlantic Wall, 3,000 miles of shore fortifications built by Germany in WWII; and the North American Aerospace Defense Command (NORAD).
Episodes in Season 7
The City Beneath Our Feet
44 min
Tower Bridge
44 min
The Chunnel
44 min
Space Stations.
44 min
The Pentagon
44 min
Bridges.
44 min
Prisons
44 min
Great Inventions
44 min
Office Wonders
44 min
Police Technology
44 min
Disaster Technology
44 min
Concrete
44 min
Camping Technology
44 min
Private Planes
44 min
Race Cars
44 min
Traffic
44 min
Buses
44 min
Gold Mines.
44 min
Banks.
44 min
The Erie Canal
44 min
Trucks
44 min
Aswan Dam
44 min
China's Great Dam
44 min
The Maginot Line
44 min
Video Games: Behind The Fun
44 min
The Body Shop
44 min
Machine Tools
44 min
Farming Technology
44 min
Assembly Lines
44 min
Suez Canal
44 min
London Underground
44 min
Combat Training.
44 min
Remote Operated Vehicles
44 min
Death Devices
44 min
Power Plants.
44 min
Inventions of War.
44 min
Plumbing: The Arteries Of Civilzation
44 min
Line of Defense
44 min
