Mbere yaho, ibiro bikuru by'igisirikare cy'Amerika byari byatangaje ko Khalid Sheikh Mohammed yari yemeye ko ari we, "kuva kuri [ku nyuguti ibanza ya] A kugeza kuri [ku nyuguti ya nyuma ya] Z" wacuze umugambi w'ibyo bitero byo ku itariki 11 y'ukwa cyenda mu 2001.
