FRESNO, Calif. - Sirhan Sirhan, who shot Robert F. Kennedy to death in 1968, was denied parole Wednesday for the 13th time since his conviction. Sirhan is "very hostile. He hates Americans. ... He continues to pose a risk to public safety," said state Board of Parole Hearings spokesman Tip Kindel. Sirhan did not attend the hearing at Corcoran State Prison or appoint a lawyer to represent him. His longtime attorney died last year after numerous failed attempts to get his client a new trial. Sirhan also did not appear at his last hearing in 2003. Periodical hearings are guaranteed...