Hurricane Katrina is still harming residents of New Orleans.  Louisiana researchers found a three-fold increase in heart attacks among people from New Orleans who survived the devastating 2005 hurricane.  The trend was first spotted among Tulane University Hospital patients in 2007.  Doctors were shocked when, four years after the storm, they still hadn't seen a drop.  Researchers think the persistently high heart attack rate is largely due to the long-term health effects of stress, anxiety, depression and other psychiatric illnesses triggered by the trauma of Hurricane Katrina.