Excerpt - SEVASTOPOL, September 16 (RIA Novosti) - The U.S. Pathfinder ship entered on Tuesday the Sevastopol harbor that is home to the Ukrainian navy and Russia's Black Sea Fleet, a Russian naval source said. "This is the second planned visit of Pathfinder at the invitation of Ukraine in the past 10 days," the source said. USNS Pathfinder (T-AGS 60) is an oceanographic survey ship owned by the Military Sealift Command and has a civilian crew and scientists on board. According to official statements, Pathfinder is searching for a ship which sank in the harbor during World War II. The...