The following video was leaked on the internet. There are six versions to this teaser... If you can't view this video anymore, chances are, it has been ordered taken down. And you can read the account here.
But I don't really see the point of why it should be taken down, it's only a teaser. And fans of 24 have been waiting for this for a very long time. They've got to throw us a little something, don't they?
I not only had goosebumps watching this, my eyes welled up.
24 Season 7 returns January 2009, with a two hour preview this coming November.