The Contingency Aeromedical Staging Facility walls, formerly located at the Air Force Theater Hospital at Joint Base Balad, Iraq, featured messages from service members and famous people paying tribute to fallen warriors and giving thanks to the staff that worked there. The CASF walls were removed and sent to the National Museum of the U.S. Air Force at Wright-Patterson Air Force Base, Ohio. (U.S. Air Force photo by Staff Sgt. Keyonna Fennell)