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John Callas

John Callas

John Callas

Latest Planetary Radio Appearance

Opportunity, Phone Home!

September 12, 2018 • 33:30

The dust is settling on the Red Planet. Is the remaining Mars Exploration Rover about to rise and shine after three months of slumber? MER Project Manager John Callas returns with a realistic yet hopeful assessment.

astronaut on Phobos
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