What a way to honor their brothers and sister who gave their lives on that day, 17 years ago.

Facebook user Chelsea Renee Farmer posted pictures and a video to her page yesterday - two local firefighters (still trying to find out what department they work for, but when a post has been shared almost 500,000 times, it can be tough) took to the stairclimbers at their local Planet Fitness. In full gear.

They climbed 110 stories - the same amount of stairs that the first responders who lost their lives on 9/11 climbed in the World Trade Center. They started at 8:46 AM - the exact time that the first plane hit the North Tower.

Respect.