Firefighters who rushed to the World Trade Center on 9/11 have a greater danger of heart disease, says a report out Friday, adding to studies that documented higher risk of cancer. The study, published in the American Medical Association’s JAMA Open Network, examined the medical data of nearly 9,800 New York fire personnel mobilized on the day the Twin Towers fell and in the months afterward. Over the 16 years following the September 11 attacks in 2001 there were 489 cardiovascular-related illnesses among the firefighters, including heart attacks, coronary artery disease and even a few deaths.