. ♪ >>> you are looking at some live pictures of downtown, if there is such a thing in a town such as this, newtown, connecticutns, teddy bears, notes that would break your heart. flowers, anything you can imagine that people could bring. mixed in with christmas decorations. there is this dissonance here with this season of joy and these horrific mass killings of 20 children, adults, inside that school. it makes the mix, just heartbreaking. this has gone on since the day, really, of those killings, to get into newtown at this point, is quite a feat. we have had some guests coming to this edition of "state of the union" that got out and walked because the traffic coming into this town, people wanting to do anything, bring something to say to the people of this flattened town, we care, we know you're suffering. of course tonight the president is going to be here and kind of speak for the nation of the grief that so many people feel that are not directly connected to this tragedy. and the investigation, it goes on as far as we know and as far as we were told just an hour ago, in fact, they are still in the school,