Credible Threat

When an assassin claiming to have been in Dallas in '63 reaches out to Richard Whelan, a Secret Service agent guarding the most threatened President in History... No one believes the threat to the President is real, until a forgotten FBI file provides an unimpeachable link to a conspiracy stretching from JFK to Martin Luther King and into the present... And to an assassin's one and only opportunity, an impossible shot from an impossible distance - at the nation's first black president... As...