If you witness a firefighter on a stair climber this Saturday, they're paying tribute to their fallen brothers & sisters who didn't make it out on 9/11.
A moment of silence was had in remembrance of 9/11 followed by the playing of "Amazing Grace" at the Denver International Airport. Watch the moment here.
Since 2003, the World Trade Center Health Program at the Rutgers University Environmental and Occupational Health Sciences Institute has been treating and monitoring thousands of responders for a variety of conditions and diseases.
The 11th anniversary of the events of September 11, 2001 is Tuesday, a distant memory for some and still-fresh pain for others. Check our listing of 9/11 memorial events, watch video and share your thoughts.