ADVANCE FOR PUBLICATION ON SATURDAY, SEPT. 4, AND THEREAFTER - Retired NYPD Officer Mark DeMarco, is seen in a reflection off a display cabinet where he keeps memorabilia from 9/11 including the small flashlight which he used to help him navigate his way out of the rubble of the fallen skyscrapers, in his home in the Staten Island borough of New York on Tuesday, Aug. 3, 2021. He worries that the public memory of the attacks is fading, that the passage of time has created a false sense of security. "Have fun with life. Don't be afraid," he says. "But be mindful." (AP Photo/Wong Maye-E)