Wiki Leaks has released the video of the civilians and journalists being shot by US troops.
The video below is fairly graphic but not stomach turning.
In the video you will see children, unarmed civilians, and journalists shot by a 30mm chain gun from a US attack helicopter.
The first video is a highlight of just the killing, the second is the entire full video that also provides some background information on the story.
MSNBC interview with WikiLeaks and others: