A National Security Council email from counterterrorism czar Richard Clarke to National Security Advisor Sandy Berger, dated September 19, 1998, said, “The United States issued a formal warning to the Taliban, and also to Sudan, that they would be held directly responsible for any attacks on Americans, wherever they occurred, carried out by the Bin Ladin network as long as they continued to provide sanctuary to it.”
– 9/11 Commission, The 9/11 Commission Report, Page 121