Ron Brown could tell tales from the grave By DAWN HARRIS Special to The Star You'd think that after the assassination of President John F. Kennedy, we'd have learned our lesson. We didn't. As with JFK's murder in 1963, two recent events have been marked by conspiracy theories and bungled investigations: the crash of TWA Flight 800 and the plane crash that killed then Commerce Secretary Ron Brown. But don't count Kansas City author Jack Cashill as a garden-variety conspiracy theorist. Although the title of his new book suggests both the conspiratorial and the partisan, Cashill bends over backward to...