Line of Defense
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Sinopsis
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).
S07E01
44 min
The City Beneath Our Feet
3 ene. 2000
S07E02
44 min
Tower Bridge
10 ene. 2000
S07E03
44 min
The Chunnel
11 ene. 2000
S07E04
44 min
Space Stations.
3 feb. 2000
S07E05
44 min
The Pentagon
27 mar. 2001
S07E06
44 min
Bridges.
29 feb. 2000
S07E07
44 min
Prisons
6 mar. 2000
S07E08
44 min
Great Inventions
16 mar. 2000
S07E09
44 min
Office Wonders
14 mar. 2000
S07E10
44 min
Police Technology
15 mar. 2000
S07E11
44 min
Disaster Technology
17 abr. 2000
S07E12
44 min
Concrete
8 may. 2000
S07E13
44 min
Camping Technology
25 may. 2000
S07E14
44 min
Private Planes
31 may. 2000
S07E15
44 min
Race Cars
6 jun. 2000
S07E16
44 min
Traffic
12 jun. 2000
S07E17
44 min
Buses
19 jun. 2000
S07E18
44 min
Gold Mines.
22 jun. 2000
S07E19
44 min
Banks.
27 jul. 2000
S07E20
44 min
The Erie Canal
31 jul. 2000
S07E21
44 min
Trucks
3 ago. 2000
S07E22
44 min
Aswan Dam
14 ago. 2000
S07E23
44 min
China's Great Dam
22 ago. 2000
S07E24
44 min
The Maginot Line
10 sep. 2000
S07E25
44 min
Video Games: Behind The Fun
12 sep. 2000
S07E26
44 min
The Body Shop
17 sep. 2000
S07E27
44 min
Machine Tools
9 oct. 2000
S07E28
44 min
Farming Technology
15 oct. 2000
S07E29
44 min
Assembly Lines
16 oct. 2000
S07E30
44 min
Suez Canal
17 oct. 2000
S07E31
44 min
London Underground
18 oct. 2000
S07E32
44 min
Combat Training.
19 oct. 2000
S07E33
44 min
Remote Operated Vehicles
25 oct. 2000
S07E34
44 min
Death Devices
2 nov. 2000
S07E35
44 min
Power Plants.
6 nov. 2000
S07E36
44 min
Inventions of War.
8 nov. 2000
S07E37
44 min
Plumbing: The Arteries Of Civilzation
14 nov. 2000
S07E38
44 min
Line of Defense
5 dic. 2000
S07E39
44 min
Gadgets
13 mar. 2000
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