It is not known where on Earth the satellite will hit. But officials familiar with the situation say about half of the 5,000-pound spacecraft is expected to survive its blazing descent through the atmosphere and will scatter debris — some of it potentially hazardous — over several hundred miles. The officials spoke on condition of anonymity because of the sensitivity of the matter.

The satellite is outfitted with thrusters, small engines used to position it in space, that contain the toxic rocket fuel hydrazine. Hydrazine can cause harm to anyone who contacts it.

 Source : MSNBC Space