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A Tulsa firefighter affixed name tags representing two New York City firefighters to the underside of his helmet and climbed the height of the World Trade Center.

Those symbols, known as accountability tags, are normally given to the supervising fire chief and attached to the truck so firefighters know who is in a burning building. Instead, Tulsa Firefighter Jarred Henderson carried New York firefighters David Arce’s and John Tipping’s accountability tags on his helmet.

Henderson was one of about 130 emergency responders carrying tags with the names of New York firefighters killed on 9/11, climbing up 110 floors to commemorate the sacrifice made 17 years ago at the World Trade Center.

“Some scenarios you train for; some you can’t train for, and those you try to find where it fits best with what you have trained for,” Henderson said.

Arce and Tipping — both 36 — were among the hundreds of firefighters killed while responding to the Sept. 11, 2001, terrorist attack.

Arce’s shift had already ended when he jumped on a fire engine to go to the World Trade Center. Arce had the habit of bringing home stray animals and buying Christmas presents for underprivileged children, according to the New York Times.