The investigation of the East Africa embassy bombings (see 10:35-10:39 a.m., August 7, 1998) led to the discovery of the phone number of an al-Qaeda communications hub in Sana’a, Yemen (see August 4-25, 1998). The hub is run by an al-Qaeda veteran named Ahmed al-Hada, who is helped by his son Samir and is related to many other al-Qaeda operatives in Yemen and elsewhere. He is also the father in law of 9/11 hijacker Khalid Almihdhar, whose wife, Hoda al-Hada, lives at the hub with their children. [Newsweek, 6/2/2002; Die Zeit (Hamburg), 10/1/2002; MSNBC, 7/21/2004; Suskind, 2006, pp. 94; Wright, 2006, pp. 277, 309, 343, 378] Several of Ahmed al-Hada’s relatives die fighting for al-Qaeda before 9/11, a fact known to US intelligence. [Los Angeles Times, 12/21/2005; Guardian, 2/15/2006] The NSA may already be aware of the phone number, as they have been intercepting Osama bin Laden’s communications for some time (see November 1996-Late August 1998) and, according to Newsweek, “some” of bin Laden’s 221 calls to Yemen are to this phone number. [Newsweek, 2/18/2002; Sunday Times (London), 3/24/2002; Media Channel, 9/5/2006] The US intelligence community now begins a joint effort to monitor the number. The NSA and CIA jointly plant bugs inside the house, tap the phones, and monitor visitors with spy satellites. [Mirror, 6/9/2002; Wright, 2006, pp. 343; New Yorker, 7/10/2006 
] US intelligence also learns that the communications hub is an al-Qaeda “logistics center,” used by agents around the world to communicate with each other and plan attacks. [Newsweek, 6/2/2002] The joint effort enables the FBI to map al-Qaeda’s global organization (see Late 1998-Early 2002) and at least three of the hijackers use the number, enabling the NSA to intercept their communications and find out about an important al-Qaeda meeting in Malaysia (see December 29, 1999 and January 5-8, 2000 and Early 2000-Summer 2001). It appears al-Qaeda continues to use this phone line until Samir al-Hada dies resisting arrest in early 2002 (see February 13, 2002).
Early 2000-Summer 2001: NSA Intercepts Communications between 9/11 Hijackers in US and Al-Qaeda Communications Hub
While the 9/11 hijackers are in the US, the NSA intercepts several calls between them and an al-Qaeda communications hub in Sana’a, Yemen, run by Ahmed al-Hada, who is hijacker Khalid Almihdhar’s father-in-law (see August 4-25, 1998).
Summary of Calls – 
The first calls are made by Almihdhar and are intercepted during the spring and summer of 2000 (see Spring-Summer 2000). More calls are made by hijacker Nawaf Alhazmi after the bombing of the USS Cole in October 2000 (see Mid-October 2000-Summer 2001). The final call from the US is intercepted just a few weeks before 9/11 (see (August 2001)).
The NSA intercepted the hijackers’ calls outside the US before this (see Early 1999 and December 29, 1999) and continues to do so in 2000 (see Summer 2000) after Almihdhar returns to Yemen (see June 10, 2000 and (Mid-June-Mid-July 2000)).
Calls’ Content – Some of the calls may only contain non-operational information, as they are reportedly between Almihdhar and his wife. [9/11 Commission, 7/24/2004, pp. 222; Suskind, 2006, pp. 94; Wright, 2006, pp. 343] However, the calls are also used to relay messages to the 9/11 hijackers. [Embassy of Yemen (Washington), 2/13/2002; MSNBC, 2/14/2002; MSNBC, 5/2005]
Agencies’ Roles – The CIA is the lead agency monitoring the communications hub. It has planted bugs inside it and is wiretapping all calls (see Late August 1998). Intercepts of calls to and from the hub are a major plank of the US intelligence community’s effort to fight al-Qaeda. Also involved is the FBI, which is using phone records to plot these calls on a map (see Late 1998-Early 2002). Some of the calls intercepted by US intelligence come from Osama bin Laden’s satellite phone in Afghanistan (see August 4-25, 1998 and Late August 1998). After 9/11, counterterrorism officials will say that the number was one of the hottest targets being monitored by the NSA and was an “intelligence bonanza.” [Los Angeles Times, 12/21/2005; Wright, 2006, pp. 343]
Importance of Failure – Also after 9/11, counterterrorism officials will agree that the failure to follow leads to the US from this number was a huge missed opportunity to stop the 9/11 plot. For instance, FBI agent Kenneth Maxwell will say: “Two al-Qaeda guys living in California—are you kidding me? We would have been on them like white on snow: physical surveillance, electronic surveillance, a special unit devoted entirely to them.” [MSNBC, 7/21/2004; New Yorker, 7/10/2006 ]
Discussed after 9/11 – The failure to roll up the plot based on these communications intercepts will be discussed following 9/11 (see Summer 2002-Summer 2004 and March 15, 2004 and After).
Summer 2002-Summer 2004: 9/11 Investigations Glance over Intercepts of Hijackers’ Calls
Both the 9/11 Congressional Inquiry and the 9/11 Commission examine the NSA’s intercepts of various calls made by the hijackers to an al-Qaeda communications hub in Sana’a, Yemen (see Early 2000-Summer 2001). The 9/11 Congressional Inquiry refers to several of the calls and gives an idea of the content of some of them. But it does not mention those made by Nawaf Alhazmi and possibly other hijackers from the US after the USS Cole bombing, which are only disclosed later in the media (see Mid-October 2000-Summer 2001 and March 15, 2004 and After). However, this section of the Inquiry report is heavily redacted so most details remain unknown. It states that, although the NSA intercepted the calls and disseminated dispatches about some of them, the NSA did not realize the hijackers were in the US at the time the calls were made. [US Congress, 7/24/2003, pp. xii, 11-12, 143-146, 155-157 ] The 9/11 Commission Report contains a briefer section on the intercepts and deals with those which led to the surveillance of the al-Qaeda summit in Malaysia (see January 5-8, 2000). In addition, it mentions that Almihdhar called his wife from San Diego in the spring of 2000, but fails to mention that his wife lived at an al-Qaeda communications hub and that the calls were intercepted by the NSA (see Spring-Summer 2000). [9/11 Commission, 7/24/2004, pp. 181, 222] The Los Angeles Times comments: “The [9/11 Congressional Inquiry] and the Sept. 11 commission that came after it referred indirectly to the calls from Yemen to San Diego. But neither report discloses what the NSA gleaned from the calls, or why they were never disclosed to the FBI.” [Los Angeles Times, 12/21/2005] The publication of the 9/11 Commission report and revelations about domestic surveillance by the NSA will lead to increased media interest in and revelations about the intercepts starting from 2004 (see March 15, 2004 and After).
