I've been watching the History and Discovery channels' shows about asteroids and all the physicists laugh or even cackle at the concept. However, they all seem to have the same assumption, that someone would nuke it when it is on its way TOWARD Earth. What would be wrong with watching it to see if it goes through the "keyhole" and if it does, then nuke it on its way AWAY from Earth, you know, for maximum vector effect? Obviously you'd have to have the nuke platform already out there when Apophis pokes its face around next time.