That aside, if this video is found to be real, I will disagree with FF that David Mortari should be left over there forever. He should be pulled out immediately and dishonorably discharged. Mostly because if his conscience allows him to brutally kill a puppy (again note that we really don't have the whole story, this is based solely on what I see in the video), then he should not be allowed to serve with our brave young men and women who honorably fight for our freedom, without brutality.
But, we truly don't know the whole story. Being the victim of video myself, I can attest that just because you see it on video doesn't mean that's how it went down. Too many people walk away believing a simple grainy, compressed, 80 degree view of a scene to be 100% truth with no distortion. Sad.