Staff Sgt. John Alford, 28th Maintenance Squadron isochronal dock chief, explains a missing part on a B-1B Lancer from a slide show to Chief Master Sgt. Lloyd Hollen, 12th Air Force command chief, Sept. 24, 2008. Chief Hollen visited the 28th Maintenance Group as part of his two-day Ellsworth tour. (U.S. Air Force photo by Airman Corey Hook)