Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Njem: Mohamed Atta, onye isi ndị na-awakpo ụgbọelu ahụ, na onye ọzọ so ha, bụ Abdulaziz al-Omari, rutere n'ọdụ ụgbọelu mba ụwa dị na Portland n'elekere 5:41 nke ụtụtụ n'elekere Eastern Daylight Time na Septemba 11, 2001. Ha banyere ụgbọelu Colgan Air Flight 5930, nke e mere ndokwa ịpụ na 06:00 site na Portland, Maine, ma fega Boston. Ndị ọkwọ ụgbọelu abụọ ahụ nwere tiketi nke mbụ na ụgbọ elu na-ejikọta Los Angeles; Atta debere akpa abụọ, Omari enweghị. Mgbe ha banyere n'ụgbọala, Kọmputa-Assisted Passenger Pre-screening System (CAPPS) họpụtara Atta maka inyocha akpa ndị ọzọ, ma ọ banyere n'ụgbọala ahụ n'enweghị ihe merenụ. Ụgbọelu si Portland gbapụrụ n'oge ma rute Boston n'elekere 6:45. Mmadụ atọ ndị ọzọ tọrọ ụgbọelu, Waleed al-Shehri, Wail al-Shehri, na Satam al-Suqami, rutere n'ọdụ ụgbọelu Logan n'elekere 06:45, ebe ha hapụrụ ụgbọala ha gbazitere n'ebe a na-adọba ụgbọelu. N'elekere 06:52, Marwan al-Shehhi, onye na-anya ụgbọelu nke United Airlines Flight 175, kpọrọ oku site na ekwentị na Logan Airport gaa na ekwentị Atta. Ebe ọ bụ na e nyeghị ha akwụkwọ njem maka Flight 11 na Portland, Atta na Omari abanyela ma gafee nchekwa na Boston. N'oge a na-eme ndenye ego ọsọ ọsọ mgbe ụgbọ elu si Portland gachara, ndị ọrụ ụgbọelu ahụ etinyeghị akpa Atta n'ụgbọelu nke 11. Suqami, Wail al-Shehri, na Waleed al-Shehri bịakwara n'ụgbọelu na Boston. Wail al-Shehri na Suqami nyochara otu akpa; Waleed al-Shehri enyochaghị akpa ọ bụla. Ndị CAPPS họọrọ mmadụ atọ ahụ maka nnyocha ngwongwo zuru ezu. Ebe ọ bụ na ndị CAPPS na-enyocha nanị akpa, ndị ohi atọ ahụ ejichaghịkwa nlezianya nyochaa ha n'ebe ndị nche na-enyocha ndị njem.  Ajụjụ: Ònye na-enyochaghị akpa ọ bụla?
Waleed al-Shehri