September 11 -- The New Pearl Harbor (FULL)

The National Anthem is performed by Young People's Chorus of New York at the 9/11 memorial ceremony at Ground Zero in New York City. abcn.ws/3leEhE9 #NeverForget | ABC News Live

A man in New York City, living just a few blocks from the World Trade Center, recorded himself on the morning of 9/11 after hearing a huge explosion and assuming it was something harmless—maybe a parade. In those first moments, you can almost see the last traces of an earlier way of thinking: his mind reaches for celebration as the default explanation, because the idea of a major attack happening at home doesn’t even register as a realistic option. It’s a kind of innocence that disappeared quick

Most of us remember where we were on 9/11. We watched the events in New York, Pennsylvania, and Washington D.C. unfold from our windows, our televisions and on the ground. The artifacts and installations featured in the 9/11 Memorial Museum tell the story of what happened on 9/11, what led up to it and its aftermath. | National September 11 Memorial & Museum