What began with 1,500 people in 2002, one year after the terror attacks, is now considered by many to be one of the top 5K runs in America.
Thousands participated in the event, which retraces Stephen Siller's final footsteps from the Hugh L. Carey Tunnel to the World Trade Center on 9/11.
Members from the FDNY and NYPD took part in the Tunnel to Towers Climb Sunday morning at One World Trade for the first time in two years.
The Tunnel to Towers 5K Run and Walk in honor of the fallen firefighter Stephen Siller returned to the streets of New York City Sunday.
A ceremony honored the lives of first responders lost since the September 11 terror attacks.
Stephen Siller's family didn't want to stay in a dark place after he died a hero on 9/11, so they turned their focus into doing good in his memory and all the others who perished that day.