The Defence Department said on Monday it had a "high degree of confidence' that the missile fired at a dead U.S. spy satellite in space destroyed the satellite's fuel tank as planned. In its most definitive statement yet on the outcome of last Wednesday's shootdown over the Pacific, the Pentagon said based on debris analysis it is clear the Navy missile destroyed the fuel tank, "reducing, if not eliminating, the risk to people on Earth from the hazardous chemical.' The tank had 454 kg of hydrazine, a toxic substance that U.S. government officials believed posed a potential health hazard to humans if the satellite had descended to Earth on its own. The presence of the hydrazine was cited by U.S. officials as the main reason to shoot down the satellite