Charles Elachi (R), JPL director, congratulates a staff member of the Mars Science Laboratory Curiosity rover after it successfully landed on Mars prior to a press conference at the Jet Propulsion Laboratory in Pasadena, California, USA, August 5, 2012. The Mars Curiosity rover touch downed on the Martian surface and will explore the Red Planet for two years. The Curiosity robot is equipped with a nuclear-powered lab capable of vaporizing rocks and ingesting soil, measuring habitability, and potentially paving the way for human exploration. [Photo/CFP]