OMAHA, Neb. (AP) — A surgeon who contracted Ebola in his native Sierra Leone did not receive aggressive treatment until nearly two weeks after he first started showing symptoms — a delay that doctors said probably made it impossible for anyone to save his life. Dr. Martin Salia was in the 13th day of his illness when he reached Omaha on Saturday. He had waited three days to be formally diagnosed after an initial test for Ebola came back negative.