Since 1991, I have photographed commuters in New York, London and Paris. From 1995 to 1998, I worked in the Graybar Building, next to New York's Grand Central Station. Sometimes, in the midst of my own daily commute, I was struck by the intense flow of humanity and the station's beauty. At other times, I was too preoccupied to notice anything but what was next on my schedule. These images reflect the dynamic brilliance of such moments. They speak to the rush and quiet, to the ebb and flow of humankind in Grand Central Station and similar spaces around the world.