Sept. 11, 25 Years Later: What Does 'Never Forget' Mean Now?

Twenty-five years after the Sept. 11 terrorist attacks, memories of the day remain fresh for so many. Some recall where they were when they heard the news. Others remember traumatic and harrowing experiences. And for those who lost loved ones, the pain and heartache are indelible. But as a new generation has come of age, a new challenge has emerged.