Attacking America? That isn't a new threat. And as for the schools...
I remember on September 11th, I read on FR that some parents were running to the schools to get their children. I didn't do so. I firmly believe that bin Laden doesn't have a target marked on my child's elementary school. It isn't symbolic enough for bin Laden.
They are alluding to a new means of attacking "in America". Reading the article, they use the phrase "in a new wonderful method". That could refer to the weapon of choice or it could refer to the target of choice.... or it could refer to both.
Also, The Vatican is not "in America".
BTW, I firmly believe bin Laden is dead. It's the other nuts that fell out of the tree that concern me. They want to kill you and your sweet little children. Be it in the carpool lane, in the cafeteria, at recess or even on Sunday morning while kneeling to pray in your place of worship, you and your children as well as me and my children are all targets.