I have no words for this.
Warning: The video below contains real and disturbing imagery of a massacre in a war zone. Those sensitive to such things should probably not watch.
More info here.
Wikileaks was the one to release this video, given to them from a very brave source in the military. They have been detained for trying to release it. They are also in need of some cash. If you can spare it, please give them a donation. They do more journalism than any major media outlet you care to name.