I watched the edited video first and read the commentary. I watched the journalists and saw their cameras. They looked like cameras, not guns. And I was definitely upset knowing they were killed. I watched that video until the end and really believed that no weapons were ever present. Then I read 4tuneit1's comments and rewatched that part of the video with a more careful eye, and upon close review, I did see what looked to be weapons in the video. I definitely saw cameras, but I also saw a long, slender object being carried which very much looked like a loaded RPG. Watch BEFORE the part where the guy is aiming something around the corner. While they're still walking. You'll see a guy with a long object... I think that's more likely to be the actual RPG that was found on-site. And just before the shooting began, I saw what looked to be an AK-47 judging by a shape that looked like a rifle magazine, the length of the object, and the way it was being held against the guy's leg.
I've seen plenty of professional photos of Taliban soldiers and insurgent fighters holding weapons. So there's clearly photographers who hang around these types of guys. I'm thinking these war photographers were there to shoot pictures of guys holding guns and looking mean. Or maybe they went so far as attempting to film a live battle? Who knows. But I think the video is edited to present the story in a very one-sided manner. Even in the full "uncut" version, there's cuts in the video.
I agree with the sentiments that it's just a simply fucked up situation. It's the nature of this war that creates these situations. Armed enemies walking among the civilians... civilian journalists filming the combatants... the whole thing happening in a major city where hundreds of lives are at stake in any given situation... they just add to the chance of shit like this happening.
I wouldn't question our soldiers' training, though. Those guys are on the ground every day and they know the tactics that are being used against them, and they are trained to spot real enemy combatants. I sincerely doubt that the Army has a culture of carelessness in regard to the civilian population. If anything, I'm sure they train just as hard to not shoot civilians as they do anything else.