9/11 hijacker Khalid Almihdhar enters Saudi Arabia, remaining there for about two or three months. He spends some time in Mecca with a cousin. [9/11 Commission, 7/24/2004, pp. 237; 9/11 Commission, 8/21/2004, pp. 137 ] Almihdhar is on the terrorist watch list there (see 1997), and his passport contains an indicator the Saudi authorities use to track terrorists (see April 6, 1999), so the Saudis presumably register his arrival and departure.