August 23, 2001: According to German newspapers, the Mossad gives the CIA a list of terrorists living in the US and say that they appear to be planning to carry out an attack in the near future. It is unknown if these are the 19 9/11 hijackers or if the number is a coincidence. However, four names on the list are known and are names of the 9/11 hijackers: Nawaf Alhazmi, Khalid Almihdhar, Marwan Alshehhi, and Mohamed Atta. [Die Zeit, 10/1/02, Der Spiegel, 10/1/02, BBC, 10/2/02, Haaretz, 10/3/02] The Mossad appears to have learned about this through its "art student" spy ring (see for instance, March 5, 2002). Yet apparently this warning and list are not treated as particularly urgent by the CIA and also not passed on to the FBI. It's not clear if this warning influenced the adding of Alhazmi and Almihdhar to a terrorism watch list on this same day, and if so, why only those two. [Der Spiegel, 10/1/02] Israel has denied that there were any Mossad agents in the US. [Haaretz, 10/3/02] The US has denied knowing about Atta before 9/11, despite other media reports to the contrary (see January-May 2000).