Zaire, formerly the Democratic Republic of the Congo, hosts this week-in-the-life photo essay. Most of young Joseph's days are spent in the classroom of the Catholic mission school -- which, except for its minimal furnishings, looks pretty much like schools anywhere, and his weekend is taken up by a birthday excursion to see the fishermen and pelicans on scenic Lake Albert. As a result, we become a good deal less intimate with Joseph than we did with the subjects of most previous face-to-face encounters -- never even glimpsing the inside of his home. The pictures establish Zaire's tropical lushness and the similarities of Joseph's routine to that of an American child, but altogether it's a disappointing week's work.