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Season Finale

How Do They Do It?: Season 6

6x20 Make Military Helicopters; Design Metro Systems; Engineer Artificial Reefs
TV-G

Episode

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Aired2009-11-20T03:00:00Z on Discovery
Runtime22m
CountryUnited States
LanguagesEnglish
GenresDocumentary

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Making military helicopters; metro systems; engineering artificial reefs.

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