When the Edmund Fitzgerald went down on Lake Superior 30 years ago tonight, among the 29 crew members lost were two cooks: Charles Robert Rafferty, and Alan Kalmon. They were two of the best in their trade. They worked in the galley kitchen of the famed ore freighter, feeding the rest of the crew with elaborate, freshly cooked meals. Yesterday, when the radio producers known as the Kitchen Sisters were here to talk about their new project "Hidden Kitchens," Davia Nelson told me they were reminded of the work they did which led to the discovery of the freighter food.