BROOKS CITY-BASE, Texas (AFPN) -- Students of the Aircraft Mishap Investigation and Prevention course at the U.S. School of Aerospace Medicine sift through the "wreckage" at a mock aircraft crash site. The site is used in field exercises to give students a realistic idea what an actual site might be like. The course recently underwent changes, moving from a primarily lecture-based format to a more hands-on, problem-based learning approach. (Air Force photo by Tech. Sgt. Alfonso Ramirez)