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.

An airman trains in a gas mask confidence chamber.

CBRN Training

Air Force Senior Airman Ryan Hornyak, 374th Civil Engineer Squadron emergency management journeyman, breaks a tablet of 2-chlorobenzalmalononitrile in a gas mask confidence chamber during chemical, biological, radiological and nuclear training at Combined Arms Training Center Camp Fuji, Japan, July 6, 2018. Air Force photo by Yasuo Osakabe

Photo Gallery