Unit's Report Supports Kerry's Version WASHINGTON - The Navy task force overseeing John Kerry's swift boat squadron in Vietnam reported that his group of boats came under enemy fire during a March 13, 1969, incident that three decades later is being challenged by the Democratic presidential nominee's critics.    The March 18, 1969, weekly report from Task Force 115, which was located by The Associated Press during a search of Navy archives, is the latest document to surface that supports Kerry's description of an event for which he won a Bronze Star and a third Purple Heart...