A stack of Vietnam Veteran lapel pins during the Vietnam Veteran Pinning, March 29, 2019, at the Main Exchange at Hill Air Force Base, Utah. Base Exchanges around the world hosted pinning ceremonies to honor Vietnam veterans on Vietnam Veterans Day. Vietnam Veterans Day is celebrated every March 29 to honor the courage and sacrifice of those who served in the Vietnam War. (U.S. Air Force photo by Cynthia Griggs)