How Do They Do It?

Season 6 Episode 20: Make Military Helicopters, Design Metro Systems, Engineer Artificial Reefs

Find out how they make military helicopters, how they design metro systems and how they engineer artificial reefs.

Genre:

Documentary

Seasons:

17

Episodes:

287

Cast:

Quality:

HD

Duration:

22 min

First Air:

2006

Rating:

7.5