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The way this has been done is to construct a sandwich with concrete, with shingle as the filling, and then another concrete layer at the bottom of that sandwich, the theory being, if you get hit by a bomb
Full Transcript
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The way this has been done
00:00:02.052 --> 00:00:07.052
is to construct a sandwich with concrete,
00:00:07.059 --> 00:00:11.001
with shingle as the filling, and then another concrete layer
00:00:11.001 --> 00:00:12.003
at the bottom of that sandwich,
00:00:12.003 --> 00:00:15.695
the theory being, if you get hit by a bomb...
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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.