LANCASTER, Pa. (WHTM) -- The 15th Annual 9/11 Memorial Stair Climb was held Saturday at Penn Medicine Park in Lancaster.

This Thursday marks 24 years since the attack on the U.S. on Sept. 11, 2001.

Each year, hundreds of firefighters from across the region climb the equivalent of the 110 stories of the World Trade Center to remember the fallen first responders.

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The climb, in full turnout gear, is to symbolically complete the climb they made in an effort to rescue victims.

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