Participants are limited to 1,000 and will climb 2,226 steps to the top of the 104-story building to raise money for wounded military veterans and first responders, according to the New York Post.
The Tower Climb benefits the Stephen Siller Tunnel to Towers Foundation, which was created to honor FDNY firefighter Stephen Siller who ran from the Brooklyn Battery Tunnel to the World Trade Center with more than 60 pounds of gear on Sept. 11, 2001.
The event also “pays special homage to FDNY Captain Billy Burke,” according to the foundation’s website. On Sept.11, 2001, Captain Burke was leading firefighters through the North Tower, ultimately staying inside to assist two workers until the tower collapsed.
By 9/11 Memorial Staff