All That Mattered: Prince Charles and Lady Diana wed Tour bus plunges into a ravine, killing at least 37 people in Italy A bus crash in Italy is being called one of the worst in that country's history. At least 37 people were killed after the tour bus plunged 100 feet into a ravine Sunday, outside of Naples. Rescuers are still sifting through the ruble, looking for survivors. Gayle King reports.