'Now Curiosity is there: It’s time to do some science'

California Gov. Jerry Brown, center, tours NASA's Mars Curiosity rover mission In-Situ Instrument Laboratory room at the Jet Propulsion Laboratory in Pasadena, Calif., Wednesday, Aug. 22, 2012. From left is Dr. Charles Elachi, director of JPL, Gov. Brown and Richard Cook, Mars Science Laboratory (MSL) Deputy Project Manager. (AP Photo/Damian Dovarganes, Pool)