Freed believes that the lingering cloud of dust -- caused by the towers' collapse and the digging out of ground zero -- caused some of her long- and short-term medical problems, such as her "WTC cough" and other respiratory issues.

CNN: The story

For a moment, Haslet-Davis lay motionless amid a cloud of dust and mounting panic.

CNN: Boston bombings destroy dancer's foot, but not her spirit

For now, the workers labour in a cloud of red dust, stirred up by the earth-moving equipment.

BBC: Villagers despair in Hungary's red wasteland