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Naperville will commemorate the Sept. 11, 2001, terrorist attacks with a memorial ceremony Thursday along the Riverwalk.

The event sponsored by the Naperville Exchange Club will begin at 6 p.m. at the Cmdr. Dan Shanower Memorial behind the Naperville Municipal Center, 400 S. Eagle St.

The featured speaker at this year’s ceremony will be Brian Hastings, a retired New York Police Department detective who helped coordinate search and rescue efforts at Ground Zero. Naperville Mayor George Pradel also will reflect on the attacks.