Test operators in a clean room at NASA's Jet Propulsion Laboratory, Pasadena, Calif., monitor some of the first motions by the robotic arm on the Mars rover Curiosity after installation in August 2010. This photo, taken Aug. 31, 2010, shows the arm in a partially extended position. The arm has a reach of about 2.3 meters (7.5 feet) from the front of the rover body.
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Image Credit: NASA/JPL-Caltech