Stock Photo Description: Free, public domain image: U.S. Air Force Thunderbirds Flying in Formation .
The U.S. Air Force Thunderbirds fly in formation over California in preparation for an upcoming air show. The Thunderbirds are the Air Force's premier demonstration squadron and represent the Air Force throughout the nation and abroad. (U.S. Air Force photo/Senior Airman Matthew Smith.
This public domain photograph may not be used in materials, advertisements, products, or promotions that in any way suggest approval or endorsement of any people appearing in the photos. Department of Defense guidelines for use.