What do you think makes a good landscape photograph?

Describe what you see happening in this image.  This image helped change minds about the war in Vietnam, why do you think it did that? 

After watching the video, does the impact of this photo change knowing that it was posed?  Is it still a documentary photograph if it has been posed and the woman's thumb removed in the darkroom? 

Compare these two images.  Talk about the line, shape/form, and texture of these images.