A group of Madison Area Technical College students had been working in New Orleans for several days and they were getting tired of eating frozen sandwiches.A man was nice enough to offer them barbecue. So the students returned the favor: They picked up their tools and gutted his house. "That's the economy they're working in now. It's very unofficial. You do favors for each other," said Allie Berenyi, an MATC construction and remodeling instructor, who served as an adviser on the trip. The delegation, made up of 47 students and three advisers, was one of several from Madison to spend...