NATIONAL FIGURES LEND A HAND TO 'LOCAL PEACE MOM' By Ellyn Moran Santiago - The Sun Staff WESTERLY - Sen. Ted Kennedy's message on Stephany Kern's voicemail had the ring of sincerity, she said. "I'm so sorry to have to leave a message..." the Massachusetts senator told this grieving mother and Westerly resident. And he promised to keep calling her cell until he was able to reach her. "All of the Kennedys and I are thinking of your extremely brave son..." Kennedy told Kern. It's a terrible, difficult, sad time. We're praying for you and your family and offering up...