![US firefighter climbs 110 'storeys' on gym stair machine to replicate journey of fallen 9/11 twin towers colleagues - World News - Mirror Online US firefighter climbs 110 'storeys' on gym stair machine to replicate journey of fallen 9/11 twin towers colleagues - World News - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article8816072.ece/ALTERNATES/s615b/Jason-Harding-tribute-for-911.jpg)
US firefighter climbs 110 'storeys' on gym stair machine to replicate journey of fallen 9/11 twin towers colleagues - World News - Mirror Online
![Sportsnet on Twitter: "He climbs 110 flights of stairs every year in full gear to honour the firefighters who lost their lives at the World Trade Center on 9/11. 🙏 🎥: IG/davepfit Sportsnet on Twitter: "He climbs 110 flights of stairs every year in full gear to honour the firefighters who lost their lives at the World Trade Center on 9/11. 🙏 🎥: IG/davepfit](https://pbs.twimg.com/amplify_video_thumb/1436701188586618884/img/Tmy8sKau_Y_eb34-.jpg)
Sportsnet on Twitter: "He climbs 110 flights of stairs every year in full gear to honour the firefighters who lost their lives at the World Trade Center on 9/11. 🙏 🎥: IG/davepfit
![Stepping up: Leeds Firefighters participate in 9/11 Memorial Stair Climb | Community | newsaegis.com Stepping up: Leeds Firefighters participate in 9/11 Memorial Stair Climb | Community | newsaegis.com](https://bloximages.chicago2.vip.townnews.com/newsaegis.com/content/tncms/assets/v3/editorial/f/c1/fc1c4622-d4d7-11e9-a7aa-43dca0f59fbf/5d7961c468cac.image.jpg?resize=500%2C500)