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

Photos

Snapshots of what’s happening in the Defense Department.

Army Staff Sgt. Derek Leonhardt reacts to tear gas exposure during chemical, biological, radiological and nuclear defense training at Joint Base Elmendorf-Richardson, Alaska, April 13, 2016. Leonhardt is assigned to the 25th Infantry Division, 40th Cavalry Regiment, 4th Brigade Combat Team (Airborne), Alaska. Air Force photo by Justin Connaher

Tear Gas Exposure

Army Staff Sgt. Derek Leonhardt reacts to tear gas exposure during chemical, biological, radiological and nuclear defense training at Joint Base Elmendorf-Richardson, Alaska, April 13, 2016. Leonhardt is assigned to the 25th Infantry Division, 40th Cavalry Regiment, 4th Brigade Combat Team (Airborne), Alaska. Air Force photo by Justin Connaher

Photo Gallery