Al-Qaeda leader Mamdouh Mahmud Salim (a.k.a. Abu Hajer) makes frequent visits to Hamburg, Germany, and sometimes attends the Hamburg mosque that is attended by a few of the future 9/11 hijackers. [Vanity Fair, 1/2002] The 9/11 Congressional Inquiry will later say that Salim was Osama bin Laden’s “right hand man.” [US Congress, 7/24/2003, pp. 51 ] Starting in 1995, Salim makes frequent visits to Germany. Some of these trips are to Hamburg. Salim has links to Mamoun Darkazanli, who lives in Hamburg and has signing powers over Salim’s bank account. [Vanity Fair, 1/2002] Salim first opens a bank account in Hamburg with Darkazanli in 1995. [Boston Globe, 10/6/2001] Darkazanli is also friends with Mohammed Haydar Zammar. Salim has links to Zammar as well. The nature of these links is unclear, but US and German intelligence will later investigate Zammar due to his links with Salim (see Shortly After September 16, 1998). [Der Spiegel (Hamburg), 12/12/2005] Zammar and Darkazanli both regularly attend the Al-Quds mosque in Hamburg. When Salim visits Hamburg, he attends the Al-Quds mosque as well. [Vanity Fair, 1/2002] Beginning in early 1996, future 9/11 hijacker Mohamed Atta and other members of his future al-Qaeda Hamburg cell begin regularly attending the Al-Quds mosque, with different members joining at different times (see Early 1996). The mosque holds about 150 people for Friday prayers. [McDermott, 2005, pp. 1-5] It is not known if Salim ever meets with Atta or any other members of the Hamburg cell. But Zammar, at least, is considered part of the cell, and he or Darkazanli could have introduced Salim to some of the others. One key member of the cell, Said Bahaji, is frequently seen at the Al-Quds mosque with Zammar and Darkazanli. [McDermott, 2005, pp. 72] On September 16, 1998, Salim is arrested in Munich, Germany, ending any link he might have had to the al-Qaeda Hamburg cell (see September 16, 1998). It is not known if US or German investigators ever learn of the link between Salim and the Al-Quds mosque before 9/11.