Members of the Mars Exploration Rovers Assembly, Test and Launch Operations team gather around NASA's Rover 2 and its predecessor, a flight spare of the Pathfinder mission's Sojourner rover, named 'Marie Curie.'

Members of the Mars Exploration Rovers Assembly, Test and Launch Operations team gather around Rover 2 and its predecessor, a flight spare of the Pathfinder mission's Sojourner rover, named Marie Curie.

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