VINEYARD HAVEN, Mass. — President Barack Obama is aiming to underscore his commitment to a region weary of calamity as he travels to New Orleans on the fifth anniversary of Hurricane Katrina. Obama ends his Martha's Vineyard vacation Sunday and heads to the Gulf, five years to the day from when Katrina roared ashore in Louisiana. Eighty percent of New Orleans was flooded when the storm tore through protective levees.
