Assessment photo of Livadica railroad tunnel. Assessment photograph of the Livadica railroad tunnel, Serbia, used by Joint Staff Vice Director for Strategic Plans and Policy Maj. Gen. Charles F. Wald, U.S. Air Force, during a press briefing on NATO Operation Allied Force in the Pentagon on April 14, 1999. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 040777-N-WXQ32-363.jpg Photo Gallery