Two of the United Airlines Flight 175 hijackers check in. These are likely Ahmed and Hamza Alghamdi.
The two appear unaccustomed to traveling. One tells the representative, Gail Jawahir, that he needs a ticket, though upon examining his documents she finds he already has one. Both men have problems answering standard security questions, which Jawahir has to repeat very slowly until they give the routine, reassuring answers.