Sorry, it is 456 kids. So where are the pictures of 456 kids being evacuated in a pandemonium as shots are being fired. The thread you linked only shows a few kids.
Surely there is helicopter footage.
Where is it?
Assume that Sandy Hook took place.
I do.
Then the question becomes why is so much info being kept from the public?
Let's try this one more time. There was no mass evacuation. So you will not find pictures of 600, or 456 kids being evacuated in a pandemonium as shots are being fired, because that is not what happened. The school was on lock down and the children were evacuated piecemeal in small groups.
You have to remember that this is a post-Columbine world, and plans are in place at every school in the country to deal with just such a scenario. So, you shouldn't expect to see a chaotic Columbine-style evacuation, when every school has drills to prevent such chaotic evacuations from happening if a shooting occurs.
"Surely there is helicopter footage."
The helicopters didn't arrive at the scene that quickly, so why would you think that? The police are already taping off the crime scene in the footage that I saw, so I would think that the children were already evacuated by that time.
"Then the question becomes why is so much info being kept from the public?"
No, that only becomes the question if you don't understand that investigations usually have to conclude before the results of investigations are released to the public.
I know we're in the world of 24hr news coverage but why would you think cameras would be rolling at some unknown school at the time this tragedy happened. It was all over by the time the police got there much less the MSM.