9.6K views · 408 reactions | 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 | Facebook

9.5K views · 443 reactions | Two steel columns, from the North Tower, known as tridents. They are the first artifact that visitors encounter as they make their descent into the 9/11 Memorial Museum and the only one visible from the 9/11 Memorial. www.911memorial.org/visit | National September 11 Memorial & Museum | Facebook

50 years ago, Apollo 11 launched the historic mission that put humans on the moon https://cnn.it/32B7miY | CNN

Twenty years after the September 11th attacks, we remember the heroes, victims, and survivors. CNN Films presents 9/11, airing Saturday at 9 p.m. ET | CNN