9/11 first responders and recovery workers honored

Visitors to the National September 11 Memorial walk around the twin pools, Tuesday, Dec. 20, 2011 in New York. The September 11 Museum is top right. (AP Photo/Mark Lennihan)
May 30, 2012 6:39:41 AM PDT
The National September 11 Memorial and Museum is marking the 10th anniversary of the end of cleanup operations at the site with a tribute to recovery workers and first responders.

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