Spirit Grinds Adirondack, Looks for Iron

Quantum Jim writes "Space.com reported on Friday that Spirit used its Rock Abrasion Tool against a Martian rock dubbed Adirondack. Although the rover spent three hours grinding the rock, it was only skinned by about 2.7 mm. Scientists say this is due to an unexpected amount of resistance. Spirit is currently standing by for ground contollers to deactivate a safety feature so it can be repositioned"