Dutch riot police, foreground and left, form a road block on the A2 motor way at the entrance to Amsterdam, Netherlands, Sunday Sept. 4, 2011, to prevent about 150 members of the Satudarah (One Blood)... more 
Dutch riot police, foreground and left, form a road block on the A2 motor way at the entrance to Amsterdam, Netherlands, Sunday Sept. 4, 2011, to prevent about 150 members of the Satudarah (One Blood) motorcycle gang from entering the city. Several gatherings of Harley Davidson riders in the Netherlands have been cancelled recently for fear of clashes between the Hells Angels and Satudarah. (AP Photo/Evert Elzinga) less 
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Associated Press | Photo By Evert Elzinga
Sun, Sep 4, 2011 11:24 AM EDT