I was coming up out of a subway station in Lower Manhattan somewhere in the seventeen minutes between the first plane hitting the North Tower and the second one hitting the South Tower. I don't have a cleaner way to say it than that. One tower was already burning when I came up the stairs. By the time I understood what I was looking at, there were two.

I want to be precise about what actually happened that day before I say anything else, because the number gets thrown around loosely and it deserves better than that. Two thousand nine hundred seventy-seven people died directly that morning -- two thousand seven hundred fifty in New York, one hundred eighty-four at the Pentagon, forty over a field in Pennsylvania. It is the deadliest terrorist attack recorded anywhere in the world. It is the deadliest attack on American soil since Pearl Harbor, sixty years earlier. It is not, and I want to say this plainly rather than let the bigger, easier version of the claim stand, the single deadliest day of American life since the Civil War -- Antietam alone, one day of fighting in 1862, killed more people than that. But Antietam was two armies that had mustered, marched, and formed lines, each side knowing exactly what the day was going to be. Nobody who walked into the World Trade Center that morning, or drove into the Pentagon parking lot, or boarded a flight out of Newark, had any reason to think that day was going to be a battle. They were just people living their lives -- going to work, dropping their kids off, catching a flight they'd booked weeks earlier -- and they never came back. That is the actual distinction worth holding, not the bigger number.

I had servers in a colo in that same part of the city, running Eyeweb's infrastructure. Nobody could reach them for months. The security perimeter around Liberty Street didn't ease until Giuliani opened it back up on November 28th, and for the whole stretch in between, my own machines just kept running, unmanaged, behind a line neither I nor anyone else at the company could physically cross. That's a small thing next to everything else that happened that morning, and I'm including it anyway, because it's the part of that day that was actually mine to carry, distinct from what the country carries collectively.

Hazel was about twenty-five miles north of me that morning, at Indian Point in Buchanan -- a nuclear power plant, which meant that by the time I was trying to get to her, the Coast Guard and the Navy already had boats in the water on the Hudson right next to where she was. I was trying to get home to a wife standing next to an active nuclear plant with a military response already forming around it. We had two real problems once the towers came down and neither one was abstract: how do we get home, and how do we even talk to each other while we're trying. The subway was shut. The bridges and tunnels were a question mark. The phone network was overwhelmed past the point of being useful. Gas stations couldn't even process a credit card -- whatever network they ran on was as overwhelmed as everything else -- so getting a car filled up wasn't a given either, on top of everything else. Tarrytown, on the Hudson, between the two of us, was the place we were both actually trying to reach, and getting there was not a given for either one of us that day.

I had friends at the Pentagon too. That wasn't a coincidence of who I happened to know -- it was after my time at TASC and before I went to IQT, and by then I already had real relationships in the defense industry, going back to a Coast Guard station I'd worked on even earlier than that. I'm not going to say more than that about who or what. Some things get held rather than elaborated on, and this is one of them.

What almost nobody outside the city understood at the time, and what I lived directly, was what the security shutdown did to Lower Manhattan as a place people actually had to eat in. I went back to work in the city in the weeks after, and the stores were empty. Not picked-over-empty -- actually empty, shelves with nothing on them, because the neighborhood runs on daily scheduled deliveries and there's no standing food inventory built into a dense urban grid like that. The restricted zone broke the delivery cycle for months. Restaurant revenue in the area fell somewhere between thirty and seventy percent. Chinatown ran its own economic impact study afterward and found that seventy-eight percent of surveyed businesses directly attributed their losses to the collapse in foot traffic the security zone caused. That's not a statistic I looked up cold. That's the neighborhood I was standing in.

Twenty-five years later, some of what that morning set in motion is still unfinished, and some of it is only now getting named honestly. New York's mayor released a hundred and seventy thousand pages of documents this week showing that city officials knew the air around Ground Zero was toxic in the aftermath and told the public it was safe to breathe anyway. Today, for the first time, the 9/11 Memorial and Museum is holding a moment of silence specifically for the people who died later from what was in that rubble -- and that number has now passed the number who died on the day itself. I didn't live downtown, I worked there, during the period the air was supposedly fine. I don't know yet what that means for me personally, and I'm not going to pretend I do just to give this piece a cleaner ending.

It took me decades to go back to where the towers had stood. When I finally did, I cried.

The Pentagon is only now breaking ground on its own permanent memorial visitor center, a hundred million dollars, hoped to open in 2029, and as of this week only about a fifth to a quarter of the funding is actually secured. Lower Manhattan itself has come back in a way that would have been hard to predict standing in it that fall -- roughly three times the residential population it had then, nearly the same number of workers, a twenty-billion-dollar rebuild that includes the memorial, a mall, a performing arts center, office towers with companies like Spotify and Condé Nast in them now. This same week, the TSA quietly started letting some non-passengers back through security to reach the gate -- something that was completely normal before that morning and has been gone for twenty-five years, receding now without much notice at all. And close to a third of the country alive today was born after it happened, which means for more and more people, this day is something they inherit rather than something they remember.

I don't have a clean lesson to close this on, and I don't think I'm supposed to. I was in that city that morning by accident of geography and work, the same as almost everyone else who was there. What I carry from it isn't a moral. It's a subway stairwell, a wife twenty-five miles north trying to get to the same town I was trying to get to, servers running unattended behind a line for months, a neighborhood that couldn't get food trucked in, and friends at a building that got hit too. Twenty-five years on, some of what that day actually cost is only now getting an honest accounting. I don't think that's unusual. I think that's what an entire country living through the same morning, from every different angle it's possible to live through it from, actually looks like a quarter century out.