I don't have a crystal ball. But from what I have read about Obama - who he is, how he thinks, and what he is doing - I have a hunch that the next time the Bad Guys hit America, it's going to be really bad.
The Good people need to be ever vigilant, because the nitwits who elected this guy aren't paying any attention.
But I think it became clear quite some time ago that they had lost on that battlefield. Their resources were better spent elsewhere. Afghanistan? Maybe. But perhaps the terrorists saw a chance to shift the focus in a larger way. My guess is that the terrorists have been spending 6-12 months considering how they could hit us here in the US. With the right guy in the White House, such a blow might send out troops our of Afghanistan and Iraq and really change the game.
I say the attack has been planned, and it is close.