it's a commercial building, actually, which houses the irs, that was hit by the plane. now, the big question here, the unresolved question, at this hour, is whether, in fact, mr. stack was targeting that specific building, which houses the irs. did he crash it intentionally to commit suicide or did he crash it intentionally to do that and hit this building as well? that is the big question. no definitive answer. some theorys about what may have happened here, but no definitive indication that, in fact, he was aiming at that building. but we do know that he was a pilot, he had this plane registered to him. so he certainly was a capable pilot. and if he had flown over this area before, he would probably have a good mental view of what the buildings were. and if he had extensive dealings with the irs, he would no specifically which building it was. fair to say that this is not in