Every week, Chelsea Merz has lunch with a homeless man named Matthew, in the same restaurant. Matthew's been on the street for seven years, but once or twice a year, he housesits for a friend. She talked to him after he was housesitting for 16 days, on the day he went back out on the street. This story is part of a larger project Chelsea is putting together, with help from Jay Allison, the Cape and Island NPR stations, and the Corporation for Public Broadcasting. (8 minutes)