Rover-team members at NASA Jet Propulsion Laboratory, Pasadena, Calif., check slight movements by a test rover during tests simulating the challenge of getting NASA Mars Exploration Rover Spirit out of a sand trap on Mars.
Rover-team members at NASA Jet Propulsion Laboratory, Pasadena, Calif., check slight movements by a test rover during tests simulating the challenge of getting NASA Mars Exploration Rover Spirit out of a sand trap on Mars.