Vienna Document Evaluation Exercise
SPANGDAHLEM AIR BASE, Germany – Lt. Col. Dietmar KÖppen, German air force pilot, tries on a helmet as Staff Sgt. Jason Clark, 52nd Operations Support Squadron demonstrates how it works Sept. 23. Colonel KÖppen was here participating in the Vienna Document 1999 Evaluation exercise, an ongoing inspection program designed to ensure the base is ready for treaty compliance inspections and evaluations. (U.S. Air Force photo/Staff Sgt. Logan Tuttle)