I was 13 years old on September 11, 2001, sitting in my middle school math class in Richboro, Pennsylvania, next to my twin sister.
Before our class knew what was happening, students began being called out of the room. Some had parents who worked at the World Trade Center. Others had parents who worked for airlines. Eventually, we learned about the attacks, but what I remember most is the uncertainty that followed.
And I remember the sky. It was a perfectly clear September day, an almost impossibly beautiful blue. Yet the very openness of it felt unsettling. We did not know whether another plane might come or whether the attacks were over.
Twenty-five years later, I am 38, soon turning 39, and raising two young daughters for whom September 11 will always be history.
When I pass the steel beam recovered from the World Trade Center at the National Constitution Center, the distance of 25 years disappears in an instant. I see the towers again. I think of the family friends who lost people they loved. I still tear up reading the stories of mothers and fathers, sisters and brothers, who never came home. The shock, grief, and uncertainty of that day still feel startlingly raw, as vivid as the clear blue sky that September morning.
My daughters will know September 11 differently. They can learn what happened. They can hear the stories and stand before the objects that remain. But they cannot bring their own memory of that day to them. The beam is the same. What has changed is the generation standing before it.
That is part of what makes this 25th anniversary so significant. We remember first the nearly 3,000 people whose lives were taken and the families forever changed that day. But we are also reaching a generational threshold. For those of us who lived through September 11, the day remains vivid memory. For millions of Americans, it has always been history.
How do we bridge that difference? The answer to that question is ultimately about civic memory.
Preserving history and preserving civic memory are closely connected, but they are not quite the same. Historical preservation safeguards the record: the objects, documents, testimony, places, and other evidence that allow us to know and understand what happened. Civic memory carries the human meaning of that history from one generation to the next.
Living memory begins with “I remember.” Civic memory becomes especially important when the people encountering that history can no longer say those words themselves.
Objects can help bridge that distance. Americans have long preserved physical witnesses to consequential moments in our national story: George Washington’s Revolutionary War headquarters tent, Thomas Jefferson’s writing desk, the flag that flew over Fort McHenry, soldiers’ letters sent home from war, belongings carried by immigrants beginning new lives, artifacts from Pearl Harbor, objects that traveled to the moon, and signs and banners carried by Americans seeking greater liberty and equality.
Their power is not simply that they are old or historically significant. They give physical form to experiences we can no longer witness ourselves.
September 11 left its own material record. We preserved massive pieces of steel, damaged fire trucks, and fragments from the sites of the attacks. But we also preserved identification cards, shoes, keys, photographs, handwritten notes, and personal belongings.
The ordinary objects can be among the most powerful. A set of keys reminds us that someone left home that morning expecting to use them again. A pair of shoes belonged to someone who expected to walk back through the door. A firefighter’s helmet was worn by someone who answered a call.
Objects make history particular. They narrow the distance between a national event and the individual lives within it. They remind us that history is lived by people going about ordinary lives until, sometimes, history intervenes.
But objects can only bear witness. They cannot tell the whole story. A steel beam can testify to the destruction of the World Trade Center. It cannot tell us about the people who arrived at work that morning, the firefighters selflessly climbing up the stairs as others ran down, the families waiting desperately for news, or the passengers and crew aboard Flight 93 who understood what was happening and acted to sacrifice themselves to save others. For that, we need human stories.
That is what makes objects and stories so powerful together. The object gives the story physical presence. The story tells us whose keys they were, who wore the shoes, who was waiting for someone to come home. Together, they allow another generation to encounter not only what happened, but also the people who lived it. That is how the historical record becomes part of civic memory.
And civic memory requires stewardship. Museums, memorials, archives, and historic sites preserve the evidence, voices, photographs, testimony, and context that allow each generation to encounter the past anew. Families and eyewitnesses contribute their own memories and stories. Institutions safeguard the record. People share what they remember. From both, civic memory is carried forward.
For my generation, September 11 still exists at that intersection. I can stand before the World Trade Center beam and bring my own memory to it. My daughters cannot. They will encounter the same steel, photographs, voices, and personal belongings without the math classroom, the uncertainty, or that impossibly blue September sky. Their connection will necessarily be different. It will come from what we preserve, what we tell them, and the questions they bring to both.
We cannot give the next generation our memories. What we can give them is a rich enough historical record, filled with evidence, humanity, and complexity, that they can enter the history for themselves and participate in the civic memory that surrounds it.
Twenty-five years from now, fewer people will be able to say “I remember.” Eventually, no one will.
The beam will remain. So may the fire trucks, the shoes, the keys, and the photographs. They will be part of the historical record. But the civic memory of September 11 will depend on what we do with that record: which voices and stories we preserve, how faithfully we connect them to the objects that remain, and how we invite each new generation to encounter them.
That is the responsibility this anniversary places before the generations that still remember: not simply to preserve what remains, but to preserve what it means. So that long after no one can say “I remember,” another generation can still understand why we do.
What do you remember?
This week at the National Constitution Center, our Civic Spark Studio will become a Reflection Studio, inviting visitors to share personal memories and reflections of September 11 as part of preserving our civic memory. If you’re in Philadelphia, I hope you’ll stop by and add your voice. You can also share your reflection here in the comments below.