Excerpt:
The authorities in Hamburg said Monday that they had shut down the mosque where several of the hijackers involved in the Sept. 11 attacks had met, asserting that it remained a source of radicalization nearly a decade later.
The Masjid Taiba mosque in Hamburg, known at the time of the hijackings in 2001 as Al Quds mosque, was "closed effective immediately," according to a statement by the Hamburg Interior Ministry. German television showed blue-uniformed police officers carrying computers out of the mosque in the St. Georg neighborhood.
That the small mosque near Hamburg's main train station was still in operation and still, according to law enforcement officials, indoctrinating young people with a form of Islam that encouraged violence demonstrated the challenges faced by Western democracies like Germany in controlling extremism without impinging on civil rights and religious freedom.