Twenty Five Years Later, America's Scar Tissue Still Hurts The passing of time has a curious effect on national traumas like September 11.
We tend to think that we've had enough time to process and heal, but the wounds often remain raw. Presidential historian Mark Updegrove notes that the events of Sept.
11 are "seared into the consciousness of Americans," a testament to their enduring impact and our collective inability to fully let go.