Light filters through the canopy of the tropical forest that surrounds the mountain village of Nahnala, Guatemala. The lush foliage offers welcome shade from the noontime heat. Barefooted children play noisily in the dusty road. Off to the side, a young Mayan woman sits on a flat rock against a shack, holding an infant on her lap. Her husband stands protectively nearby as a tall, big-boned American woman kneels beside her.

[ . . . ]