My money's on Osama Bin Laden as well (metaphorically speaking). Didn't he organise the bombing of the embassies about seven or eight years back? He's shacked up with the Palestinian Taliban movement now, and they were expected to make a statement earlier on - I haven't seen whether it has been made yet...
This is mind-numbing though. I've heard about the sheer numbers of possible fatalities, and I find it impossible to visualise that kind of destruction of life. I heard that there were four planes hi-jacked - three have crashed, and one is still missing. All incoming air traffic to America has been diverted to Mexico, Canada and Iceland. Fighter planes are now patrolling Washington. I've heard reports of a single plane heading towards the White House too... if that's the fourth hijacked plane, the air force will be forced to shoot it down.
This kind of thing truly infuriates me... the people who organised this haven't put their own lives on the line for their beliefs - they've trained impressionable people to hijack and fly the planes, and so have sacrificed hundreds of innocent people on the planes for the purpose of trying to kill tens of thousands more. I find it depressing that humans are capable of such atrocities...
My heart goes out to the families of the people on the planes and in those buildings, and I truly hope the rescue operation helps to bring out the survivors.