Twenty-five years after the Sept. 11, 2001, terrorist attacks, a generation of Americans has no memory of the day that changed the country forever.

Twenty-five years after the September 11 attacks killed 2,977 people and transformed the United States and the world, America faces a new challenge: preserving the memory of 9/11…

Scholars of collective memory have long argued that that societies do not remember the past simply by preserving it