out of 5.5 million residents half are obese. "usa today" a new surgical knife has the ability to help surgeons detect cancerous tissue without sending it to the lab. the knife uses molecules to analyze if the tissue is cancerous or healthy. the "l.a. times" the trial of the ship captain is underway in italy. the ship ran aground in january 2012. there were 4,000 passengers aboard, 32 of whom were killed. the captain is accused of manslaughter. washington times a new study from the smithsonian magazine. the research doesn't explain why