NATO warships, which passed through Istanbul's Bosporus Strait Thursday, entered the Black Sea for long-planned exercises and routine visits to ports in Romania and Bulgaria, the alliance said. A U.S. Navy warship entered Turkey's Dardanel Strait on Friday taking relief supplies to Georgia. Three warships - from Spain, Germany and Poland - sailed into the Black Sea on Thursday. The move is not linked to the tensions over Russia's invasion of Georgia, which lies on the eastern shore of the Black Sea, about 900 kilometers (550 miles) from the Romanian coast, said officials at NATO's military command in southern Belgium....