As a national recession wears on, more middle-class people are asking for food, even in places like affluent Montgomery County, Md. About 24,000 families have been added to the rolls of Manna Food Center in Rockville, Md., in the last year and a half, said Kim Damion, director of development and communication. Close to 400 families picked up food boxes on Thanksgiving Day this year, more than any other year since the center opened in 1983, Damion said. Manna gave food to 1,600 families on Thanksgiving week. Nationally, 49 million Americans are at risk of not getting enough to eat...