DAYTON, Ohio -- Museum restoration specialists Nick Almeter and Casey Simmons apply aircraft dope, which is a plasticized lacquer used to tighten and stiffen the fabric that is stretched over the airframe, to the PT-13D Kaydet. The aircraft is now on display in the World War II Gallery at the National Museum of the U.S. Air Force. (U.S. Air Force photo by Ken LaRock)