A US Army photo journalist was on a training mission, with an Afghan phot journalist she was training, and apparently a couple of Afghan soildiers as part of a mortar team It appears they both were trying to get a pic of when the mortar was launched, except that it exploded in the tube instead, killing all four. The photo's each took were both recovered, and released this week by the US army, with the families permission.
http://www.bbc.com/news/world-us-canada-39798988
These are amazing photos, strictly from a technical view. But the reality of what happened to these four soldiers is sobering.