NEW YORK - The dust cloud caught Carl Sadler near the East River, turning his clothes and hair white as he looked for a way out of Manhattan after escaping from his office at the World Trade Center.Gray powder billowed through the open windows and terrace door of Mariama James’ downtown apartment, settling, inches thick in places, into her rugs and children’s bedroom furniture.Barbara Burnette, a police detective, spat the soot from her mouth and throat for weeks as she worked on the burning rubble pile without a protective mask.The rubble of the World Trade Center smoulders following a terrorist attack September 11, 2001 in New York.