The terrorist threat is evolving.
Not only that, al-Qaeda has recovered to an extent. That was to be expected. Let's face it, there are folks willing to shelter bin Laden and other scumbags like him.
They're going to try to get operatives into the United States. Given the immigration debate and the recent diversion of resources into raiding places like meat-packing plants, I think it can be understood why al-Qaeda may think it can succeed.
Hopefully, in 2008, we'll get a President who will continue to take the global war on terror seriously.