<p>AP Photo/Nick Ut Rob Manning, chief engineer, speaks to the media at NASA Mars Yard at NASA's Jet Propulsion Laboratory in Pasadena on July 25. Beside Manning is a model of the Mars rover, Curiosity. After traveling 8 1/2 months and 352 million miles, Curiosity will attempt a landing on Mars the night of Aug. 5.</p>
July 31, 2012
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July 31, 2012 9:15 p.m.
Landing is key for NASA Mars rover
'Curiosity'hopes to explore Red Planet
PASADENA, Calif. (AP) - It's NASA's most ambitious and expensive Mars mission yet - and it begins with the red planet arrival late Sunday of the smartest interplanetary rover ever built. Also the most athletic.