Airmen from the 28th Munitions Squadron explain what their jobs entail to visitors during the Heritage Day celebration at the South Dakota Air and Space Museum in Box Elder, S.D., May 19, 2012. Visitors were able to see numerous displays and demonstrations while also being able to ask questions about what Airmen do every day. (U.S. Air Force photo by Airman 1st Class Anania Tekurio/Released)