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[i]A faulty rocket command sequence aboard the international space station caused the 300-ton structure to shake back and forth vigorously for two minutes last month, during what was supposed to be a routine, gentle orbital adjustment. Space experts in Houston and Moscow have spent the last two weeks searching for the cause of the shaking and doing a damage assessment. Under the worst-case scenario, such vibrations could rattle the station so much over the long term that the structure might begin to crack and leak. One of the solar arrays might bend out of position, affecting the station’s power-generating system. Experts cautioned that it was too early to determine how likely or unlikely these scenarios might be. Partly as a result of last month's anomaly, a second rocket burn originally scheduled for Wednesday has been canceled. Since the maneuvers had been intended to line up the station’s path to receive future visiting spacecraft, the dates of those missions are now in doubt. A Russian Soyuz visit in late March already has been postponed a day.[/i]
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