In a tape released in December 2001 known as 'the Jalalabad tape', the speaker is alleged to have foreknowledge of the attacks. The Central Intelligence Agency claimed the tape was probably from Osama bin Laden. Some observers, especially people in the Muslim world, doubted the authenticity of the tape. On December 20, 2001, German TV channel "Das Erste" broadcast an analysis of the White House's translation of the videotape. On the program "Monitor", two independent translators and an expert on Oriental Studies found the White House's translation to be both inaccurate and manipulative, stating, "At the most important places where it is held to prove the guilt of bin Laden, it is not identical with the Arabic", and that the words used that indicate foreknowledge can not be heard at all in the original. Prof. Gernot Rotter, professor of Islamic and Arabic Studies at the Asia-Africa Institute at the University of Hamburg, said "The American translators who listened to the tapes and transcribed them apparently wrote a lot of things in that they wanted to hear but that cannot be heard on the tape no matter how many times you listen to it."