When the US intelligence community watchlists the alias Salah Saeed Mohammed bin Yousaf, which is used by al-Qaeda leader Khallad bin Attash (see August 23, 2001), it fails to realize that “bin Yousaf” is really bin Attash, who is known to be one of the masterminds of the USS Cole bombing (see Late October-Late November 2000 and November 22-December 16, 2000). The CIA knows that both bin Attash and “Salah Saeed Mohammed bin Yousaf” were in Malaysia with 9/11 hijackers Khalid Almihdhar and Nawaf Alhazmi in January 2000 (see January 5-8, 2000, January 8, 2000, and January 4, 2001). Furthermore, the CIA has a photo of bin Attash provided by the Yemeni government, and surveillance photos and video of bin Attash with Alhazmi and Almihdhar at an al-Qaeda summit in Malaysia (see January 5-8, 2000 and Shortly After and January 5, 2000). And when bin Attash applied for a US visa, he used the “bin Yousaf” alias (see April 3, 1999), so presumably a comparison of his photo from that application with other photos would reveal that “bin Yousaf” and bin Attash are one and the same person. However, apparently no check is made for any US visa of “bin Yousaf,” even after he is watchlisted to prevent him from coming into the US, which would require a visa. Had a check been made, it would have been discovered that he applied for a visa at the same time as both Almihdhar and Alhazmi (see April 3-7, 1999), the very people who have been watchlisted together with him. Presumably, discovering that Alhazmi and Almihdhar had applied for US visas with one of the Cole masterminds would have greatly increased the urgency of finding them. [9/11 Commission, 7/24/2004, pp. 538; US Department of Justice, 11/2004, pp. 248, 300-3 ] The US missed other opportunities to learn more about this alias (see After January 8, 2000 and After December 16, 2000).