A physician who roller-bladed to the scene of 9/11 as the Twin Towers burned has published never-before-seen photos from the recovery effort at Ground Zero, as America prepares to mark the 18th anniversary of the attacks tomorrow. After seeing the towers ablaze on September 11, 2001, Dr Emil Chynn, who had been walking his dog, rushed to the site to see what was happening. When he arrived he was surrounded by debris and smoke but rapidly got to work setting up what he claims to be the first triage center on site.