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

California Gov. Jerry Brown, second from left, tours NASA's Mars Curiosity double rover at the Vehicle System Test Bed, or VSTB, inside the In-Situ Instrument Laboratory room at the Jet Propulsion Laboratory in Pasadena, Calif., Wednesday, Aug. 22, 2012. Seen from left: Peter Theisinger, MSL project manger, NASA JPL, Pasadena; Gov. Brown; Richard Cook, Mars Science Laboratory, MSL Deputy Project Manager, and Dr. Fuk Li, Director for the Mars Exploration Directorate. (AP Photo/Damian Dovarganes, Pool)