May 20, 2001: Hijacker Overstays US Visa
9/11 hijacker Satam Al Suqami becomes an illegal overstay on this day. He entered the US on April 23 (see April 23-June 29, 2001) and was allowed to stay for 30 days, so, according to the 9/11 Commission, his permission to remain in the US expires on this day. He remains in illegal status until 9/11. [9/11 Commission, 8/21/2004, pp. 8, 21, 23
] Both Mohamed Atta and Marwan Alshehhi also overstayed their visas (see January 10, 2001 and January 11-18, 2001). At least one more of the hijackers, Khalid Almihdhar, lied on his visa application form, meaning he was in the US illegally (see August 29, 2001).