President Bush ordered the action to prevent any possible contamination from the hazardous rocket fuel on board, and not out of any concern that parts of the spacecraft might survive and reveal its secrets, the officials said.
The challenging mission to demolish the satellite on the fringes of space will rely on an unforeseen use of ship-based weapons developed to defend against ballistic missile attacks.
The effort will be a real-world test of the nation’s antiballistic missile systems and its antisatellite abilities, even though the Pentagon said it was not using the effort to test its most exotic weapons or send a message to any adversaries.
The ramifications of the operation are diplomatic, as well as military and scientific, in part because the United States criticized China last year when Beijing tested an antisatellite system with an old weather satellite as a target.
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