The annual Tunnel to Towers 5K Run and Walk in honor of fallen firefighter Stephen Siller, who died on September 11, 2001, returned to the streets of New York City Sunday.
Thousands participated in the event, which retraces Siller's final footsteps from the Hugh L. Carey Tunnel, formerly called the Battery Tunnel, to the World Trade Center.
This year, organizers are also honoring some U.S. service members.
Runners began in Brooklyn and ended on West and Murray streets across from the World Trade Center, the route Siller took when he abandoned his truck and ran through the tunnel towards the towers.
The event is a tribute to the 343 firefighters and first responders who were killed on 9/11, as well as the service members who died during the war on terror.
"First you feel hot, because that tunnel has no breathing," participant Scott Nokes said.