On March 11, 2002, “a private Immigration and Naturalization Service [INS] contractor sent approvals to two young men granting them permission to change their immigration status from ‘visitors’ to ‘students.’ The two had enrolled at Huffman Aviation, a flight school in Venice, Florida. The two men then left the country twice after filing their applications, which meant that they had abandoned their request for a change of status, but the INS had not noticed. The two men were Mohammed Atta and Marwan al-Shehhi, two of the hijackers who killed themselves on 9/11.”
– John Ashcroft, Never Again, Page 138