Tom Bachman tags a section of the famous B-17 bomber, "Memphis Belle," in the Collection Management Division of the National Museum of the United States of the Air Force on Wright-Patterson Air Force Base in Ohio. The restoration is expected to take ten year restoration to complete. The museum is the world's largest and oldest military aviation museum, featuring 400 aerospace vehicles on more than 17 acres of indoor exhibit space. Mr. Bachman is a conservator. (U.S. Air Force photo/Master Sgt. Cecilio Ricardo)