NEW ORLEANS — Mississippi and Louisiana marked the 10th anniversary of Hurricane Katrina on Saturday by ringing church bells, laying wreaths and celebrating the resiliency of a region still recovering from a disaster that killed more than 1,800 people and caused $151 billion in damage.Addressing dignitaries at New Orleans' memorial to the unclaimed and unidentified dead, Mayor Mitch Landrieu spoke of the dark days after the monstrous storm and how the city's residents leaned on [...]