Turkish intelligence informs Germany’s domestic intelligence service that Mohammed Haydar Zammar is a radical militant who has been traveling to trouble spots around the world. Zammar has already made more than 40 journeys to places like Bosnia and Chechnya, and in 1996 he pledges his allegiance to al-Qaeda during a trip to Afghanistan (see 1991-1996). Turkey explains that Zammar is running a dubious travel agency in Hamburg, organizing flights for radical militants to Afghanistan. As a result, by early 1997, German intelligence will launch Operation Zartheit (Operation Tenderness), an investigation of Islamic militants in the Hamburg area. The Germans will use a full range of intelligence techniques, including wiretaps and informants. [Stern, 8/13/2003; Vanity Fair, 11/2004] Operation Zartheit will run for at least three years and connect Zammar to many of the 9/11 plotters (see March 1997-Early 2000).
Late 1996 or After: Jarrah Associates with Monitored Hamas Fundraiser
Within a few months of arriving in Germany, hijacker Ziad Jarrah begins to associate with Abdulrahman al-Makhadi, a local hardline Muslim who raises money for the militant Palestinian group Hamas and is monitored by the German intelligence service BfV. The German newspaper Frankfurter Allgemeine Zeitung will say that al-Makhadi, also known as Abu Mohammed, is “known to the [German security service] BfV as a Hamas activist and ‘instigator,’” and that, “It is therefore difficult to imagine that the 26 year old Lebanese [Jarrah] was not also registered by the machinery of the intelligence services.” Jarrah later travels around Germany with al-Makhadi and meets other radicals. Al-Makhadi runs the local mosque and makes money by selling special Arab food he purchases in Hamburg there. [Frankfurter Allgemeine Zeitung (Frankfurt), 2/2/2003; McDermott, 2005, pp. 51]
1997: German Intelligence Unsuccessfully Attempts to Turn Zammar, a Member of Al-Qaeda’s Hamburg Cell
German intelligence unsuccessfully attempts to turn Mohammed Haydar Zammar into an informant. In 1996, the Office for the Protection of the Constitution (BfV), Germany’s domestic intelligence service, learned that Zammar had extensive Islamist militant ties (see 1996). In 1997, the BfV starts an investigation into Islamist militants in Hamburg that is centered on Zammar (see March 1997-Early 2000). Apparently, as part of this investigation, two BfV officials meet with him twice and attempt to get him to become an informant. However, Zammar strongly rejects the proposal. He says he will not serve the West, but will only serve Allah and jihad. However, he is careful to note that he is only interested in jihad outside of Germany, because under German law at this time it is not illegal to be a member of a violent militant group as long as all the violence takes place outside of Germany. [Der Spiegel (Hamburg), 11/21/2005] German intelligence will continue monitoring Zammar and many of his associates in Hamburg (see for instance March 1997-Early 2000, October 2, 1998, and July 2001).
Shortly After September 16, 1998: Captured Al-Qaeda Leader Is Linked to Al-Qaeda Hamburg Cell Member Zammar
The arrest of al-Qaeda leader Mamdouh Mahmud Salim (a.k.a. Abu Hajer) points US and German investigators to Mohammed Haydar Zammar, a member of the al-Qaeda cell in Hamburg, Germany, with a few of the future 9/11 hijackers. Salim is arrested on September 16, 1998, in Munich, Germany (see September 16, 1998). He is believed to be al-Qaeda’s financial chief, and is one of al-Qaeda’s founding members (see August 11-20, 1988). After Salim’s arrest, both German and US intelligence investigate his contacts in Germany and discover a link to Zammar. Zammar is already being investigated and monitored by the Office for the Protection of the Constitution (BfV), Germany’s domestic intelligence service (see March 1997-Early 2000). [Der Spiegel (Hamburg), 12/12/2005] Presumably, the link between Zammar and Salim should increase the urgency of the German investigation. It is unknown when US intelligence begins monitoring Zammar, but the US will discover important links between Zammar and al-Qaeda in the summer of 1999 (see Summer 1999). US and German investigators also discover a link between Salim and Mamoun Darkazanli, a Hamburg associate of Zammar’s, and they monitor him as well (see Late 1998).
November 1, 1998-February 2001: 9/11 Hijacker Atta and Associates Are Monitored Some by US and Germany in Their Hamburg Apartment
Future 9/11 hijacker Mohamed Atta, al-Qaeda operatives Said Bahaji and Ramzi Bin al-Shibh, and others in the al-Qaeda Hamburg cell move into a four bedroom apartment at 54 Marienstrasse, in Hamburg, Germany, and some of them stay there until February 2001. Investigators will later believe this move marks the formation of the Hamburg al-Qaeda cell. [Los Angeles Times, 1/27/2002; New York Times, 9/10/2002] Up to six men at a time live at the apartment, including, at times, 9/11 hijacker Marwan Alshehhi and cell member Zakariya Essabar. Alshehhi moves out after the first month; it is unclear why. [New York Times, 9/15/2001] During the 28 months Atta’s name is on the apartment lease, 29 Middle Eastern or North African men register the apartment as their home address.
Surveillance of Bahaji – From the very beginning, the apartment is under surveillance by German intelligence, because of investigations into businessman Mamoun Darkazanli that connect to Bahaji. [Washington Post, 10/23/2001] The Germans also suspect connections between Bahaji and al-Qaeda operative Mohammed Haydar Zammar. [Los Angeles Times, 9/1/2002] Bahaji is directly monitored for at least part of 1998, but German officials will not disclose when the probe began or ends. This investigation is dropped for lack of evidence (see (Late 1998)). [Associated Press, 6/22/2002; Los Angeles Times, 9/1/2002] Bahaji moves out in July 1999 and gets married a few months later (see October 9, 1999). [Der Spiegel (Hamburg), 8/29/2011]
Surveillance of El Motassadeq – German intelligence monitors the apartment off and on for months, and wiretaps Mounir El Motassadeq, an associate of the apartment-mates who will later be convicted for assisting the 9/11 plot, but apparently it does not find any indication of suspicious activity (see August 29, 1998). [Chicago Tribune, 9/5/2002]
Surveillance of Zammar – Zammar, a talkative man who has trouble keeping secrets, does not live at the apartment, but he is a frequent visitor to the many late night meetings there. [Miller, Stone, and Mitchell, 2002, pp. 259-60; Los Angeles Times, 9/1/2002; Chicago Tribune, 9/5/2002] He even lives in the apartment for a time in February 1999 (see February 1999). Zammar is the focus of an investigation that began in 1997 and continues until early 2000 (see March 1997-Early 2000). Interest in monitoring him increases in late 1998 (see October 2, 1998).
Surveillance of Atta – The CIA also allegedly starts monitoring Atta in early 2000 while he is living at the apartment, and does not tell Germany of the surveillance (see January-May 2000). Atta leaves Germany to live in the US in June 2000 (see June 3, 2000).
No Direct German Surveillance of the Apartment? – Yet, even though people like Zammar who frequently phone and visit the apartment are monitored, German officials will later claim that the apartment itself is never bugged. An unnamed senior German security official will later say that some surveillance of associated people gives “the impression that the people living there were fanatical believers. At the BfV [Germany’s domestic intelligence agency], we had to decide whether to ask permission to place a wiretap on the line at 54 Marienstrasse itself. We discussed this every day.” But he will claim that they ultimately decide they will not be able to get legal permission for a wiretap because there is no evidence that the apartment’s occupants are breaking any laws. [Vanity Fair, 11/2004] This claim that the apartment was not directly monitored seems contradicted by reports that Bahaji was the target of a surveillance investigation when he was living in the Marienstrasse apartment in late 1998 (see (Late 1998)).
What Would More Surveillance Have Uncovered? – It will later be clear that investigators could have found evidence if they looked more thoroughly. For instance, one visitor will recall Atta and others discussing attacking the US. [Knight Ridder, 9/9/2002] 9/11 mastermind Khalid Shaikh Mohammed is in Hamburg several times in 1999 and comes to the apartment. However, although there is a $2 million reward for Mohammed since 1998, the US apparently fails to tell Germany what it knows about him (see 1999). [Newsweek, 9/4/2002; New York Times, 11/4/2002] 9/11 Hijacker Waleed Alshehri also apparently stays at the apartment “at times.” [Washington Post, 9/14/2001; Washington Post, 9/16/2001] Remarkably, shortly after 9/11, the German government will claim it knew little about the Hamburg al-Qaeda cell before 9/11, and nothing directed it towards the Marienstrasse apartment. [Daily Telegraph, 11/24/2001]
Late 1998: German Intelligence Begins Monitoring Al-Qaeda Hamburg Cell Member Bahaji
German intelligence investigates al-Qaeda Hamburg cell member Said Bahaji. The investigation stems from an investigation into cell member Mohammed Haydar Zammar, which started in 1997 (see March 1997-Early 2000). Many contacts are noticed between Zammar and Bahaji. According to the Los Angeles Times: “In part because of the acquaintance, German police in 1998 performed what they describe as limited surveillance on Bahaji. Bahaji at the time was living with [future 9/11 hijacker Mohamed] Atta and [hijacker associate Ramzi] bin al-Shibh. Nothing came of the surveillance and it was discontinued.” [Los Angeles Times, 9/1/2002] However, German officials will not say when exactly the surveillance stops. [Associated Press, 6/22/2002] Bahaji lives with Atta and bin al-Shibh at the Marienstrasse apartment starting in November 1998 (see November 1, 1998-February 2001), so the surveillance of him probably starts in late 1998. However, it is likely that interest in and possibly surveillance of Bahaji continues after this time. Bahaji will be watchlisted in March 2000 (see March 2000). Author Terry McDermott will later comment about the difficulty of being put on a watch list: “In Germany, this was not a casual event. In order to be placed on such lists, intelligence agencies had to go to great lengths to demonstrate to the Bundestag, the German parliament, that the person under question was of potential danger to the state.” McDermott will further note that being placed on this list would be an indication the person has been under surveillance for a long time. [McDermott, 2005, pp. 73, 297]
January 31, 1999: Germany Monitors Call to 9/11 Hijacker Alshehhi, Shares Information with CIA
German intelligence is tapping the telephone of al-Qaeda operative Mohammed Haydar Zammar, and on this date, Zammar gets a call from a “Marwan.” This is later found to be future 9/11 hijacker Marwan Alshehhi. Marwan talks about mundane things, like his studies in Bonn, Germany, and promises to come to Hamburg in a few months. German investigators trace the telephone number and determine the call came from a mobile phone registered in the United Arab Emirates (UAE). [US Congress, 7/24/2003 
; Deutsche Presse-Agentur (Hamburg), 8/13/2003; New York Times, 2/24/2004] Although the call is short and seemingly innocuous, according to Vanity Fair, some “parts of the conversation seemed redolent of some kind of conspiratorial code.” For instance, at one point, Alshehhi says, “I’ve heard your mother died.” Zammar replies: “Yes, she passed on. She left me alone.” Alshehhi then asks: “But your father didn’t travel with you? I’ve seen him here.” Zammar answers, “No, my father is here.” Regarding whether or not it actually is code, a senior German official will later say: “Our desk officer had a certain feeling about that call.… You can say it was his nose—not that there was any single statement, but he had a feeling that there could be more behind it.” The desk officer writes a report about the call. Then, about a month later, the BfV (German domestic intelligence) will contact the CIA and ask for more information about men from the UAE named Marwan, and for help in tracing the phone number (see March 1999). [Vanity Fair, 11/2004]
February 17, 1999: Germans Monitor Call Mentioning Key Al-Qaeda Hamburg Cell Members, Including 9/11 Hijacker Atta’s Full Name and Number
German intelligence monitors a phone call in which the names of key members of the al-Qaeda Hamburg cell are mentioned. Future 9/11 hijacker Mohamed Atta’s full name and telephone number are even mentioned. German domestic intelligence (BfV) has been monitoring al-Qaeda operative Mohammed Haydar Zammar’s telephone (see March 1997-Early 2000). On this day, Zammar is not home, but his parents speak to each other on the phone and are trying to figure out where he is. One of them suggests that Zammar is at a meeting with “Mohamed, Ramzi, and Said,” and can be reached at the phone number of the Marienstrasse apartment where all three of them live. This refers to cell members Atta, Ramzi Bin al-Shibh, and Said Bahaji. “Mounir”—cell member Mounir El Motassadeq—is mentioned as well. However, apparently German intelligence fails to grasp the importance of these names, even though Bahaji and El Motassadeq are also under investigation at this time (see August 29, 1998). The Marienstrasse apartment is the center of the cell’s activity (see November 1, 1998-February 2001). [Associated Press, 6/22/2002; New York Times, 1/18/2003; Der Spiegel (Hamburg), 2/3/2003] Atta’s first and last name are mentioned in the phone call between Zammar’s parents. Agents check the Marienstrasse phone number, which they find is registered to Bahaji. They also confirm the street address, but it is not known what they make of the information. [Der Spiegel (Hamburg), 2/3/2003]
March 2000: German Intelligence Places Two 9/11 Hijacker Associates on a German Watch List
German intelligence places two members of the al-Qaeda Hamburg cell, Mounir El Motassadeq and Said Bahaji, on a German watch list. The two men, associates of future 9/11 hijackers Mohamed Atta, Marwan Alshehhi, and Ziad Jarrah, had come to the Germans’ attention because of their association with al-Qaeda recruiter Mohammed Haydar Zammar, who they meet regularly. The watchlisting means that their arrivals and departures to and from Germany will be reported immediately. [Der Spiegel (Hamburg), 2/3/2003; US Congress, 7/24/2003 ] Hamburg cell member Mohammed Haydar Zammar is also placed on a watch list at some point before 9/11 (see Before September 11, 2001). El Motassadeq was first investigated by German authorities in 1998 (see August 29, 1998). Bahaji was the target of a surveillance investigation starting in 1998 as well (see (Late 1998)). Bahaji may have recently traveled to Afghanistan with some associates using a route monitored by European intelligence agencies (see Late November-Early December 1999).
El Motassadeq’s Travels Will Be Noticed Three Times – Because he is watchlisted, German intelligence will keep track when El Motassadeq goes to Denmark twice, and when he flies to Istanbul on his way to a training camp in Afghanistan (see May 22, 2000). [New York Times, 1/18/2003]
Importance of Watchlisting – Author Terry McDermott will later comment about the watchlisting of El Motassadeq: “In Germany, this was not a casual event. In order to be placed on such lists, intelligence agencies had to go to great lengths to demonstrate to the Bundestag, the German parliament, that the person under question was of potential danger to the state. Being placed on the list indicated that El Motassadeq had been under investigation for some time. In that he was an integral part of the group that included [Atta], [Ramzi bin al-Shibh], and Alshehhi, this at the least implies that they were being watched too.” [McDermott, 2005, pp. 73, 297]
May 22, 2000: German Intelligence Notices Hamburg Cell Member Traveling Monitored Route to Al-Qaeda Training Camp
Al-Qaeda Hamburg cell member Mounir El Motassadeq leaves Germany for Afghanistan and his travel is immediately reported to the German authorities because he is on a watch list (see March 2000). El Motassadeq flies from Hamburg to Karachi, Pakistan, via Istanbul. At least two of the future 9/11 hijackers have previously traveled this route to Afghanistan (see Late November-Early December 1999). Although Turkish intelligence is aware that radicals from Germany travel to Afghanistan via Turkey, it is unclear whether they pick up the travel by El Motassadeq (see 1996). There are two versions of German intelligence’s reaction to this trip. An early 2003 article in Der Speigel will say that the intelligence report only gives El Motassadeq’s destination as Istanbul, so there are no consequences for him. However, a later article in Stern magazine will say, “Naturally, the officials know that Istanbul is not his real destination but only the usual stopover on his way to Afghanistan, to the camps of Osama bin Laden.” [Der Spiegel (Hamburg), 2/3/2003; Stern, 8/13/2003] Indeed, El Motassadeq goes to an al-Qaeda training camp in Afghanistan (see May 22 to August 2000).
