The U.S. Air Force Thunderbirds form a heart for deployed Airmen and their families during the Sheppard Air Force Base, Texas, 75th Anniversary Air Show, Sept. 17, 2016. Since 1953, the Thunderbirds have performed for millions of people across the United States, spreading the word about the U.S. Air Force and its precision, skill and decisive combat power. (U.S. Air Force photo by Senior Airman Kyle E. Gese)