At a hastily called Arab League meeting, envoys from the 22 states merely proclaimed support for Palestinian unity and formed a fact-finding committee.
In fact, some security firms told a Senate Committee of finding hidden "trap doors" left behind by contractors and there is no way to know if they were left for benign or malicious reasons.
Republicans said a hearing before the House Ways and Means Committee Friday represented only a first step, and that much more fact-finding will occur before they can judge who is to blame.