SEATTLE — Coast Guard incident management crews are monitoring a sunken fishing vessel for pollution and hazard to navigation concerns in the Ilwaco Channel near Ilwaco, Wash., Saturday. There is a potential of 500 gallons of diesel fuel aboard the vessel. At 5:38 a.m., watchstanders at Coast Guard Sector Columbia River in Warrenton, Ore., received a report from a good Samaritan via VHF-FM channel...