9/11 was the single greatest atrocity of our time and so much is being said and recalled about it at the moment that it's difficult to add anything. I think the horror speaks for itself and doesn't need us to reminisce.
I lived through WW2 though I don't remember much about it. In the 50s we lived in the shadow of the mushroom cloud of the nuclear tests in the Pacific; the Suez crisis; the Soviet repression of the Hungarian uprising; in the 60s, the Cuban Missile Crisis. And so on, through Arab-Israeli conflicts and the Vietnam War...closer to home, IRA terrorism. Eventually, the hope engendered by the fall of the Berlin Wall was crushed by the atrocity of 9/11, and a new fear, international terrorism that could strike anywhere at any time. I don't know what you on MN want us to say, but there you are, I have put my thoughts in a kind of context.