Even with all the modern weapons of this war, warriors are still bedeviled by old-fashioned problems. It happened just this week. In Northern Iraq, a convoy of U.S. Special Forces soldiers and Kurdish allies was attacked by American bombs. Eighteen... (more) Kurds were killed and more than 45 injured, including the brother and son of a Kurdish leader. The weapons fired in this war are supposed to be precision guided and pinpoint accurate. But mistakes still happen. Correspondent Richard Schlesinger reports.