FILE - This Sept. 16, 2010 file photo shows engineers working on the Mars rover Curiosity at NASA's Jet Propulsion Laboratory in Pasadena, Calif. Curiosity celebrated its first year on

 

              FILE - This Sept. 16, 2010 file photo shows engineers working on the Mars rover Curiosity at NASA
FILE - This Sept. 16, 2010 file photo shows engineers working on the Mars rover Curiosity at NASA's Jet Propulsion Laboratory in Pasadena, Calif. Curiosity celebrated its first year on Mars and is driving toward a mountain in a journey that will take months.(AP Photo/Jae C. Hong, file)
Tags: Mars , working