John Callas and Abigail Fraeman

John Callas and Abigail Fraeman
John Callas and Abigail Fraeman With a model of NASA's Opportunity rover behind him, John Callas, project manager of the Spirit and Opportunity Mars rovers, speaks about the rovers' achievements at the agency's Jet Propulsion Laboratory in Pasadena, California. Deputy Project Scientist Abigail Fraeman (right) looks on. NASA/JPL-CaltechMars Exploration Rover - Opportunity

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