Inside a 'Clean Room': NASA Puts Mars Rover Together

It may not look like much now, unassembled under silver tarps, but once it's completed and launched, the Mars Science Laboratory will be the biggest, most powerful vehicle ever sent to the red planet. The assembly of MSL (recently re-named "Curiosity") here at NASA's Jet Propulsion Laboratory is moving along slowly but surely — mission engineers are taking their time now that they have two