NASA's biggest Mars rover poised for blastoff

FILE - In this Jan. 28, 2004 photo provided by NASA/JPL of a photo shot by NASA's Mars Exploration Rover Spirit. NASA is ending efforts to revive the sand-trapped rover Spirit, which has been silent for more than a year. Project manager John Callas of NASA's Jet Propulsion Laboratory says the last commands will be sent up Wednesday, May 25. (AP Photo/NASA/JPL,File)

November 26, 2011 3:25:33 AM PST
NASA is all set to launch the world's biggest extraterrestrial explorer.