Reuters photographer Anthony Correia began his routine subway ride to work in lower Manhattan on Tuesday, September 11, 2001. His train was underground when the planes hit the Twin Towers and after 45 minutes, rerouted to 14th Street. From there, he emerged into the altered landscape of a city in the grip of horror and trauma. His photograph of an unidentified New York City firefighter walking away from Ground Zero after the collapse of the World Trade Center Twin Towers captures the widespread sense of shock, devastation and uncertainty.