A generation cannot remember 9/11. We have a duty to make sure they learn

After the Sept.

11, 2001, terrorist attacks , this country made an enduring promise to "Never Forget." It was a promise made by those of us who witnessed the attacks.

Twenty-five years later, it is now a promise we must pass down to those born since 9/11.

More than 100 million Americans are too young to remember 9/11.

They know 9/11 as a moment in history books rather than a day that began with clear skies that were soon darkened by smoke and fear.

AMERICA’S HEARTLAND COMES FACE-TO-FACE WITH 9/11 HISTORY AS 25TH ANNIVERSARY NEARS These 100 million Americans are not all children.

They are now firefighters and police officers.

They are enlisted service members and officers carrying out missions reshaped by the 9/11 attacks.

They are parents, neighbors and volunteers.

And a great many of them now stand in classrooms as teachers and role models for our youth.

To put this in perspective, students starting high school this fall were born over a decade after the attacks.

They might also be taught by someone too young to remember 9/11 or who wasn't even born yet.

9/11 MUSEUM CEO REFLECTS ON LASTING IMPACT OF TERROR ATTACKS AS AMERICA MARKS 250TH BIRTHDAY A quarter-century on, that is the challenge before this country, and it is addressed by the work we do every day at the National September 11 Memorial & Museum: making sure the promise to never forget does not fade.

Since the museum opened in 2014, more than 28 million visitors have passed through its doors.