This image taken at Meridiani Planum in 2004 shows NASA's Mars Exploration Rover Opportunity's arm in its extended position.

This image taken by the front hazard-identification camera onboard the Mars Exploration Rover Opportunity shows the rover's arm in its extended position. The arm, or instrument deployment device, was deployed on the ninth martian day, or sol, of the mission. The rover, now sitting 1 meter (3 feet) away from the lander, can be seen in the foreground.

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