engineers study test rover in order to trouble-shoot Spirit's situation
A test rover rolls off a plywood surface into a prepared bed of soft soil.
After several days of preparing a sloped area of soft, fine soil to simulate Spirit's current sandtrap on Mars, the rover team drove a test rover into the material on June 30, 2009. The test rover became embedded in the soil, as planned. The rover team will use this setup at NASA's Jet Propulsion Laboratory, Pasadena, Calif., during the next few weeks to test possible extraction moves Spirit might use on Mars.

For all Spirit updates, go to http://www.jpl.nasa.gov/freespirit/ .

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