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.

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Defense Secretary Robert M. Gates attend the U.S. Northern Command/ North American Aerospace Defense Command Change of Command ceremony on Peterson Air Force Base, Colo., May 19, 2010. U.S. Air Force Gen. Gene Renuart was relieved by Navy Adm. Sandy Winnefeld.

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Defense Secretary Robert M. Gates attend the U.S. Northern Command/ North American Aerospace Defense Command Change of Command ceremony on Peterson Air Force Base, Colo., May 19, 2010. U.S. Air Force Gen. Gene Renuart was relieved by Navy Adm. Sandy Winnefeld.

Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, and Defense Secretary Robert M. Gates attend the U.S. Northern Command/ North American Aerospace Defense Command Change of Command ceremony on Peterson Air Force Base, Colo., May 19, 2010. U.S. Air Force Gen. Gene Renuart was relieved by Navy Adm. Sandy Winnefeld.

Photo Gallery