NEW YORK (WABC) -- Firefighters from around the world put themselves to the test in honor of 9/11 heroes.
Around 150 of them took part in the fifth annual New York City Memorial Stair Climb Saturday at Three World Trade Center.
[Ads /]
They wore full gear while racing up the building's stairs.
Hanging on the walls of the staircases were pictures of the 343 first responders who died on September 11, 2001.
[Ads /]
----------
* More New York City news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube