Secretary Cohen signs an autograph at Aviano Air Base, Italy. Secretary of Defense William S. Cohen uses the back of U.S. Air Force Airman 1st Class Cooper for support as he signs an autograph for her at Aviano Air Base, Italy, on June 19, 1999. Cohen is visiting the base to thank the U.S. service members for their role in NATO Operation Allied Force. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 435939-M-ATD62-099.jpg Photo Gallery