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(airplane engines droning) Identifying enemy planes against a night sky was challenging, so silhouette charts helped the uninitiated distinguish between friend or foe
Full Transcript
00:00:01.000 --> 00:00:03.541
(airplane engines droning)
00:00:03.541 --> 00:00:05.051
Identifying enemy planes
00:00:05.051 --> 00:00:07.961
against a night sky was challenging,
00:00:07.961 --> 00:00:10.591
so silhouette charts helped the uninitiated
00:00:10.591 --> 00:00:13.491
distinguish between friend or foe.
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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.