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.

U.S. Air Force Senior Airman Johann Karpf, a KC-10A Extender boom operator with the 908th Expeditionary Air Refueling Squadron, calculates fuel weights during a mission to Afghanistan on Dec. 9, 2009.

Senior Airman Johann Karpf calculates fuel weights during a mission to Afghanistan.

U.S. Air Force Senior Airman Johann Karpf, a KC-10A Extender boom operator with the 908th Expeditionary Air Refueling Squadron, calculates fuel weights during a mission to Afghanistan on Dec. 9, 2009.

Photo Gallery