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.

Air Force Lt. Col. Christopher Hammond prepares for an engine start up before a delta formation training sortie on Nellis Air Force Base, Nev., Jan. 12, 2015. Hammond is the lead pilot, Thunderbierd 1, assigned to the Air Force Thunderbirds air demonstration team.

Air Force Lt. Col. Christopher Hammond prepares for an engine start up before a delta formation training sortie on Nellis Air Force Base, Nev., Jan. 12, 2015. Hammond is the lead pilot, Thunderbierd 1, assigned to the Air Force Thunderbirds air demonstration team.

Air Force Lt. Col. Christopher Hammond prepares for an engine start up before a delta formation training sortie on Nellis Air Force Base, Nev., Jan. 12, 2015. Hammond is the lead pilot, Thunderbierd 1, assigned to the Air Force Thunderbirds air demonstration team.

Photo Gallery