My mother told me never explain, never complain. Even as a young actress, I determined I would never give personal interviews, since they made me so uncomfortable.
We don't have an Official Secrets Act in the United States, as other countries do. Under the First Amendment, freedom of the press, freedom of speech, and freedom of association are more important than protecting secrets.
To those who don't want the truth about Kennedy's assassination to become known, the very repetition of a charge lends it a certain credibility, since people have a tendency to believe that where there's smoke, there's fire.