Iconic pictures that changed the world

The photo of a dead 3-year-old Syrian boy on a Turkish beach captures everything we don’t want to see when we tap our phones or open our newspapers: a vicious civil war, a surge of refugees, the death of an innocent. 

The disturbing image taken this week brings to mind other, similarly haunting photos of crises. Often they revolve around children. Will the photo of the Syrian child be like other seared-in-our-memory photographs?