"It's a wheel!" That was the shout at Jet Propulsion Laboratory on Aug. 5, when the Mars Science Laboratory sent its first images back from Mars. The wheel in one of the first photos belongs to the one-ton rover, nicknamed Curiosity, that was built at JPL in La Canada Flintridge and is now on a two-year mission to examine whether conditions for life ever existed on Mars. View the rover's journey from inception to launch to first drive in this gallery that will be updated periodically with new images from Earth and Mars