The Pentagon counted down Wednesday toward an unprecedented effort to shoot down a dying and potentially deadly U.S. spy satellite, using a souped-up missile fired from a ship in the Pacific.

The timing was tricky. For the best chance to succeed, the military awaited a combination of favorable factors: steady seas around the Navy cruiser that would fire the missile, optimum positioning of the satellite as it passed in polar orbit and the readiness of an array of space- and ground-based sensors to help cue the missile and track the results.

The operation was so extraordinary, with such intense international publicity and political ramifications, that Defense Secretary Robert Gates — not a military commander — was to make the final decision to pull the trigger.

The government organized hazardous materials teams, under the code name "Burnt Frost," to be flown to the site of any dangerous or otherwise sensitive debris that might land in the United States or elsewhere. ...   more »