NEW ORLEANS (AP) - Dr. Jeffrey Coco, his wife and their three children returned to New Orleans especially for a New Year's Eve party held at a neighbor's house that did not flood in the aftermath of Hurricane Katrina. They stayed in the second story of their own house. "We normally have a fireworks display that rivals most ball parks," he laughed. "We toned it down a lot this year because all the blue roofs around." Many damaged roofs throughout the city are covered with blue plastic tarps. Coco's business is gone, along with his wife's job, his children's school...