Then-CIA Director George Tenet detailed a letter he wrote to President Bill Clinton and the national security community, warning of al-Qa’ida attacks in 1998: “Ten days later [on December 28, 1998] I wrote again, updating the previous letter and quoting a Middle Eastern service as saying that they agreed with our assessment that UBL [Usama Bin Ladin] sought to strike in the near term against at least one U.S. target. I reported that Bin Ladin had purchased ten surface-to-air missiles from Afghan warlords to defend his terrorist camps but noted that the same missiles could be used to attack aircraft on U.S. territory. I wrote again on December 30 and then on January 14, 1999, with additional details picked up from a variety of sources.”
– George Tenet with Bill Harlow, At the Center of the Storm, Page 123