A letter containing the racist terms 'dago', 'wop' and 'kike' was presented to the media by Dallas County District Attorney Craig Watkins along with blank membership cards to the night club owned by Jack Ruby, The Carousel Club, at a news conference in the Frank Crowley Courts Building in Dallas, Texas, February 18, 2008. The item is part of a batch of old documents and artefacts linked to the slaying of President John F. Kennedy recently unearthed from an old safe in a Dallas courthouse by the Dallas County district attorney's office. REUTERS/Mike Stone (UNITED STATES)