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.

Defense Secretary Ash Carter, center left, speaks with a group of students at the American Association for the Advancement of Science in Washington, D.C., June 13, 2015.

CARTER AAAS

Defense Secretary Ash Carter, center left, speaks with a group of students at the American Association for the Advancement of Science in Washington, D.C., June 13, 2015.

Photo Gallery