The FAA sends a warning to US airlines that Middle Eastern militants could try to hijack or blow up a US plane and that carriers should “demonstrate a high degree of alertness.” The warning stems from the April 6, 2001, conviction of Ahmed Ressam over a failed plot to blow up Los Angeles International Airport during the millennium celebrations. This warning expires on July 31, 2001. [Associated Press, 5/18/2002] This is one of 15 general warnings issued to airlines in 2001 before 9/11 (see January-August 2001), but it is more specific than usual. [CNN, 3/2002; CNN, 5/17/2002]