U-S warplanes bombed a building in Baghdad where they believed Saddam Hussein may have been meeting with his sons. The decison to bomb yesterday was based on information gathered by Special Operations forces which are operating covertly in Baghdad. Keith Larson, of Two Harbors, Minnesota, served with a different group of special forces, the elite Special Operations Group, during the Vietnam War. The unit's existence was only recently admitted by the U-S Army. Former Sargent Larson says he did his work in secret.