Four hundred first responders from around the world trekked up 80 stories in full gear. They honored the police officers, firefighters and first responders who died in the September 11th terror attacks.
Participants also raised money for 9/11-related illnesses.
Two Upper West Side firefighters started the event in 2014.
* More New York City news
* Send us a news tip
* Download the abc7NY app for breaking news alerts