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this is john kalas at the jet propulsion

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laboratory with your free spirit update

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what we did is to take our engineering

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test rover and drive it up into the new

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sandbox and then get it stuck or

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embedded just like spirit is on mars and

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this involves maneuvering the rover

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round driving the wheels to where the

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rover would sink in and and slide to the

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side downslope much like we think spirit

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is currently situated on mars what we

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want to be able to do is to experiment

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with different extraction techniques

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down here on earth before we actually do

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them for real up on mars our expectation

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is that it'll take some time to get

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spirit out

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and so we'll be able to get a better

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feel for that here with this facility as

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we explore these techniques and we see

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not only how well they work but how long

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it will take for them to work