Members of the Satudarah (One Blood) motorcycle gang leave after Dutch riot police blocked a group of 150 riders on the A2 motor way at the entrance to Amsterdam, Netherlands, Sunday Sept. 4, 2011, to... more 
Members of the Satudarah (One Blood) motorcycle gang leave after Dutch riot police blocked a group of 150 riders on the A2 motor way at the entrance to Amsterdam, Netherlands, Sunday Sept. 4, 2011, to prevent from entering the capital where a gathering of Harley Davidson riders took place. Several motorcycle meetings in the Netherlands have been cancelled recently for fear of clashes between the Hells Angels and Satudarah gangs. The sign at right reads "exit". (AP Photo/Evert Elzinga) less 
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Associated Press | Photo By Evert Elzinga
Sun, Sep 4, 2011 11:50 AM EDT