With jazz music, prayer and offerings to the gods, hundreds of Hurricane Katrina survivors on Saturday demanded the government move faster to rebuild the city and provide evacuees with more disaster assistance. Shouting "We're Back," protesters said they feared the city's poor would be shut out of reconstruction after being dispersed far across the United States since the storm. City officials estimate more than 300,000 New Orleans residents have yet to return since Katrina flooded the city, reducing entire neighborhoods to a rubble-strewn wasteland. In one of the largest rallies in New Orleans since the hurricane, survivors marched to City...