Dr. Jeffrey Calcaterra (right) Structural Failure Analysis team lead for Air Force Research Laboratory Materials Integrity Branch explains non destructive inspection processes to (from left) Tristan Gilreath and Alexa Gebhardt, area high school students who were attending a job Shadow Day at Wright-Patterson Air Force Base, Ohio, Oct. 27, 2017. The bi-annual event, put on by the Air Force Research Laboratory's Educational Outreach Office, is designed for students to experience on the job real-life experiences, and allow them to explore a lot of potential career field opportunities. (U.S. Air Force photo/Jim Varhegyi)