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| FBI/GETTY IMAGES |
| Hani Hanjour |
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February 2001
Hani Hanjour, left, raises suspicions at an Arizona flight school with his poor English and mediocre flight skills. The FAA investigates and finds he is a legitimate student.
February 8, 2001
Mohamed Atta in the U.S. since the previous summer, visits Norfolk, Va. The FBI suspects he was scouting the naval base.
February 23, 2001
Frenchman Zacarias Moussaoui arrives in Chicago from London, en route to a flight school in Oklahoma.
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