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(soft instrumental music) As you can see, it's constructed from precast concrete
Full Transcript
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(soft instrumental music)
00:00:05.569 --> 00:00:09.459
As you can see, it's constructed from precast concrete.
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Movie Summary
During World War II, the British built or reinforced a series of structures consisting of over 26,000 buildings to form a line of defence against an expected German invasion. Rob Bell travels around the UK to learn their secrets.