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So some, you'd pull at what looked like a tree root, and that would ring a bell into the bunker, and they could open it from the inside
Full Transcript
00:00:01.000 --> 00:00:03.002
So some, you'd pull at what looked like a tree root,
00:00:03.002 --> 00:00:05.024
and that would ring a bell into the bunker,
00:00:05.024 --> 00:00:06.009
and they could open it from the inside.
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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.