Never forget

a sequence of still images depicting the World Trade Center towers in New York City, followed by scenes of rescue workers and civilians amidst the rubble and aftermath of the 9/11 attacks, with the text "Never forget" overlaid on each frame. The images show the towers from various angles, a woman being supported by a firefighter, a man being carried on a stretcher, a firefighter holding a survivor, and two men helping another man through the debris.