Documentaries can use several techniques to tell a story including observation, interviews, dramatization, mise-en-scene, and exposition. There are different types of documentaries such as fully narrated, fly on the wall, mixed, self-reflective, docu-drama, and docu-soap. Current affairs programs differ from documentaries in that they have tighter deadlines, examine stories in shorter time slots, and aim to provide daily news coverage for a broad audience.