Roving Mars: Spirit, Opportunity and the Exploration of the Red Planet

Steve Squyres is the face and voice of NASA's Mars Exploration Rover mission. Squyres dreamed up the mission in 1987, saw it through from conception in 1995 to a successful landing in 2004, and serves as the principal scientist of its $400 million payload. He has gained a rare inside look at what it took for rovers Spirit and Opportunity to land on the red planet in January 2004-and knows firsthand their findings.