If you are wondering who is behind the attacks on US troops in Iraq, US officials know for sure the identity of those responsible:

Here, US officials blame Bin Laden

But here, "senior" US officials blame Saddam

(BUT POWELL doubts that very much)

..and here yet, Defense officials blame Saddam's deputy, Izzat Ad-Duri

(but "sources" think that he is too ill to do that)

But here, Donald Rumsfeld thinks the culprit may be Ramadan (yes, the month)

...so please don't go around saying that the US government does not have a clue.