9 Season
158 Episode
MegaStructures - Season 3 Episode 4 Hoover Dam
Explore the US Treasury's impenetrable subterranean vaults housing monster money-making machines that churn out billions of dollars. See the army of protectors that ensure the world's most powerful economy with the mantra: "In God We Trust". Discover the elaborate systems of design and protection at the US Treasury premier currency manufacturer and her sister operation, the Bureau of Engraving and Printing.
- Year : 2012
- Country : United States of America
- Genre : Documentary
- Studio : National Geographic
- Keyword :
- Director :
- Cast :
"
"