Hamburg | University of Hamburg | Cell nucleus | Altona, Hamburg | Soft Cell | Cell biology | Cell | cell | cell (biology) | B-cell activating factor | Hamburg America Line | Cell (journal) | Cell (biology) | T cell | Hamburg State Opera | cell membrane | Mesenchymal stem cell | Cell membrane | Hematopoietic stem cell transplantation | Hamburg Ravensbrück Trials | Hamburg Hauptbahnhof | cell culture | Cell Biology | The Plant Cell | Solar cell | Photoreceptor cell | New Hamburg, Ontario | Kunsthalle Hamburg | Hamburg's red light district | fuel cell |
He became involved in the planning of the September 11 attacks while attending Technical University of Hamburg (TUHH) in the late 1990s, meeting Mohamed Atta, Marwan al-Shehhi and Ramzi bin al-Shibh, forming in 1998 what is now known as the Hamburg cell.