"Putting the five 'W's and an 'H' in a Caption"

Captions are critical and necessary for every photo. If there isn't a caption for a photo, there isn't any information about the photo, its just a picture. Captions bring the viewer or reader into the what, who, when, where, why and how of a photo. If the "why" is left out of the caption, the journalist runs the risk of producing an incomplete story. If the "what" is denied, and the photo isn't obviously explained by just viewing, the cutline of the story is going to have to fill in the information. Clearly if the "who, when and where" is disregarded the photo won't have much significance.