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.

Members of the Thunderbirds, the Air Force's aerial demonstration team, perform the delta formation over Daytona International Speedway during a practice flight in Daytona Beach, Fla., Feb. 21, 2015.

DELTA DRILL

Members of the Thunderbirds, the Air Force's aerial demonstration team, perform the delta formation over Daytona International Speedway during a practice flight in Daytona Beach, Fla., Feb. 21, 2015.

Photo Gallery