The short answer: twenty-five years after 9/11, more FDNY members have died of World Trade Center-related illness than were killed on the day. The lesson for every first responder: an injury from this work does not have to show itself when it happens. It arrives later, and systems built to react to the moment of impact miss it.
This week marks twenty-five years since thousands of first responders ran toward the worst day this country has seen. Many of them walked back out.
We have spent the years since burying them anyway.
What 25 years cost 9/11 first responders
The people who worked the pile did not get to leave it there. The dust and smoke they breathed in those hours and weeks kept working, quietly, for years. It showed up later as cancers and lung disease, long after the day that caused them.
The FDNY lost 343 members on September 11, 2001. At the department's 2026 memorial service, FDNY leadership put the number who have since died of World Trade Center-related illness at 453. The department's World Trade Center Health Program, in findings reported this month, counts more than 600.
The two counts differ. Both pass 343. For the FDNY, the toll from what came after is now larger than the toll of the morning itself.
And the FDNY is one department. Responders and survivors are enrolled in the World Trade Center Health Program, run by the CDC's National Institute for Occupational Safety and Health, for monitoring and treatment of certified 9/11-related conditions.
The lesson they paid for
Those responders taught this profession the most expensive lesson in its history. I'm not sure we have learned it.
Here it is. An injury from this work does not have to announce itself when it happens.
- It arrives years, sometimes decades, after the exposure that caused it.
- It stays invisible the whole time it's doing damage.
- A system that only reacts to what it sees at the moment of impact misses it every time, until the only thing left to do is grieve.
Why delayed injuries get missed
Most of what surrounds this job runs on a date. A date of injury. A date of exposure. A report filed before the end of shift. That works for a burn or a broken wrist. It fails for anything that shows up years later.
The 9/11 responders learned that the hard way. Getting their illnesses recognized took years, and it took an act of Congress. The James Zadroga 9/11 Health and Compensation Act, signed into law on January 2, 2011, established the World Trade Center Health Program. In 2015 it was reauthorized through 2090.
Many states have cancer presumption laws for firefighters for the same reason. The illness arrives long after the exposure, and the paperwork was never built to connect the two.
The everyday version of the same shape
September 11 is the most extreme version of that truth we will ever see. It is not the only version.
I want to be careful here. The illnesses that followed 9/11 came from toxic exposure. What I'm describing next has a different cause. What it shares is the shape: delayed, invisible at the time, and missed by a system built to react to the moment.
Every long career in this job carries that shape. A thousand ordinary shifts. Broken sleep. Tones at 2am. Calls you keep thinking about on your days off. None of it generates a report the day it happens. It builds, and it surfaces years later under another name: a resignation nobody saw coming, a marriage that ended, a member everyone describes as having changed.
I spent over twenty years in the fire service, and I watched it happen to good people. I wrote about what that led me to build in The Load Nobody Could See.
What has changed, and what hasn't
For most of the fire service's history there was no way to read this kind of load. Nobody manages what they have no way to see. So the only tools were the ones that activate after something breaks.
That part has changed. Physiological load and recovery are measurable now, on each person's own baseline, early, the same way this job already reads every other risk. I've written about the difference between monitoring stress and managing it, and about why resilience is the wrong goal when nobody is measuring the load.
To be clear about what that is, and what it isn't:
- It is awareness. It shows how a person's body responds to the job and how it recovers, against their own normal.
- It is not a diagnosis. It doesn't detect cancer, lung disease or any World Trade Center-related condition, and it doesn't treat anything.
- It replaces no one. Not the clinicians, not the peer teams, and not the World Trade Center Health Program that cares for the people this lesson cost us.
Its job is narrower than any of that. See the slow injury while there's still time to act on it.
What we owe them
We owe the responders of 9/11 more than a moment of silence once a year. We owe them the lesson they paid for.
For chiefs, that lesson turns into one question worth asking this week. If a member's recovery had been drifting for months, what in your department would have noticed?
To everyone who ran toward it that day, and to everyone still carrying what it cost: we remember, and we're paying attention.
About the author
Gary Roberts is the Founder & CEO of Neurovus and has served 20 years with Fort Lauderdale Fire Rescue. He built NAVI to track each firefighter’s drift from their own baseline, helping fire departments spot burnout before it becomes a crisis. Connect on LinkedIn