On 1 September 1992, Yousef entered the United States with an Iraqi passport of disputed authenticity. His companion, Ahmed Ajaj, carried multiple immigration documents, among which was a crudely falsified Swedish passport. Providing a smokescreen to facilitate Yousef's entry, Ajaj was arrested on the spot when immigration officials found bomb manuals, videotapes of suicide car bombers, and a cheat sheet on how to lie to U.S. immigration inspectors in his luggage. Directors of the American Counter-Terrorism program later tied the travel arrangements to a phone call from Sheikh Omar Abdel-Rahman, an Egyptian militant Muslim preacher, to the Pakistani telephone number 810604.