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Spirits front right wheel ceased working on March 13, 2006, while the rover was moving itself to McCool Hill.
Its drivers attempted to drag the dead wheel behind Spirit, but this only worked until reaching an impassable sandy area on the lower slopes.
Drivers directed Spirit to a smaller sloped feature, dubbed " Low Ridge Haven ", where it spent the long Martian winter, waiting for spring and increased solar power levels suitable for driving.
That September, Opportunity reached the rim of Victoria crater, and Spaceflight Now reported that NASA had extended mission for the two rovers through September 2007.
On February 6, 2007, Opportunity became the first spacecraft to traverse ten kilometers ( 10, 000 meters ) on the surface of Mars.

1.793 seconds.