M-4 Tank Line, Fort Knox, Kentucky, June 1942
3D scan from two photos:
![](http://cdn.loc.gov/service/pnp/fsac/1a35000/1a35200/1a35207r.jpg)
![](http://cdn.loc.gov/service/pnp/fsac/1a35000/1a35200/1a35226r.jpg)
Photos found here:
http://www.loc.gov/pictures/item/fsa1992001084/PP/
http://www.loc.gov/pictures/item/fsa1992001103/PP/