Out of This World

An official website of the United States government

Here's how you know

Official websites use .mil

A .mil website belongs to an official U.S. Department of Defense organization in the United States.

Secure .mil websites use HTTPS

A lock () or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Video by Courtesy

Salt of the Earth - Master

Natochannel

April 9, 2010 | 4:22

Package made from the B-roll "Salt of the Earth" about the town of Tuzla profited from salt mining, but now it is facing the consequences of decades of over exploitation. A NATO science project is working to prevent further damage. Produced by David Heathfield.

More