“Less than 36 hours after the terror attacks, the German police received a list from the F.B.I. of 13 people suspected of links to the terror. Since the early hours of Thursday [September 13, 2001], some 100 German investigators–joined late last week by an unknown number of F.B.I. agents–have scoured 14 Hamburg apartments and detained nearly a dozen people for questioning.”
– Steven Erlanger, “Investigators Discover That 3 Attackers on Planes Attended Same German University,” The New York Times, Sep. 17, 2001