Newly released images from 9/11

Smoke billows from the grounds of the World Trade Centre in New York Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk Smoke billows from one of the twin towers Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk Smoke and ash engulf lower Manhattan Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk Smoke and ash rise above downtown office blocks Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk The upper floors of one of the World Trade Centre towers burn after terrorists fly a plane into it Photograph: Greg Semendinger/AP Photograph: Greg Semendinger/guardian.co.uk The first World Trade Centre tower begins to implode Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk A World Trade Centre tower implodes in New York Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk Smoke and ash engulf the area around the World Trade Centre after the towers collapse Photograph: Greg Semendinger/AP Photograph: Greg Semendinger/guardian.co.uk A cloud of smoke and ash engulfs lower Manhattan Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk Smoke billows from the area around the World Trade Centre in New York Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk White ash covers the downtown area near the grounds of the World Trade Centre Photograph: Greg Semendinger/NYPD via ABC News/AP Photograph: Greg Semendinger/NYPD via ABC News/guardian.co.uk