The Fifth of July Kelly SimmonsSometimes the people you know best are the ones you should fear the mostAny of the Warners could have been behind the accident. Every one of them had a problem that threatened to tarnish more than their old money silver. Having spent the past three decades' worth of summers on Nantucket, the Warners are as much a part of the island as the crust of salt on the ferry. But this year is different: Tripp is no longer the father he was, and it becomes clear