From students to firefighters, to individuals working at the World Trade Center that day, those who will "never forget" shared stories of strength and adversity, detailing the challenges they've overcome — as well as the their hopes for the future.

"My message to people is: 'We will all be touched by adversity, or wounded at some point in our lives, but we can refuse to be held by it.' And I think that's why I survived," explained Lauren Manning, who was in the North Tower at 8:46 a.m. when the first plane hit.

"Whatever it is, you just can't give up. Because there's always hope for a new beginning, if we work for it," explained Helaina Hovitz, who was in middle school a few blocks away from the World Trade Center.

Editor's note: A special thanks to everyone who shared their story. You can find excerpts from books written by Hovitz and Manning here.