MSM broadcasts Sandy Hook footage in place of Oregon "shooting" and pretends it is a live feed from Oregon.
I don't make this stuff up. I just provide links through to it and sometimes commentary.
If you think your viewers are really stupid, it is easier to just recycle footage and put a new caption on it. Minimal effort and no need to even move from the editing desk.
Nobody at PRAVDA under Stalin tried this stuff. They knew people weren't stupid enough. They would not think to try it.