An official website of the United States Government

Here's how you know

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

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

Tunnel Detection

A U.S. Army Engineer Research and Development Center engineer uses tunnel-detection equipment at an undisclosed location. Army photo

The Department of Defense provides the military forces needed to deter war and ensure our nation's security.

Photos