A technician removes a component from NASA's Mars Science Laboratory rover 'Curiosity', where it is undergoing pre-flight tests in the 'clean room', at the spacecraft assembly facility at the Jet Propulsion Laboratory in Pasadena, California, Sept 16, 2010. The Mars Science Laboratory rover about the size of a Mini-Cooper automobile, is due to be launched on its mission to Mars late 2011, arriving on Mars in August 2012.[Photo/Agencies]

Technicians enter the 'clean room' of the spacecraft assembly facility where NASA's Mars Science Laboratory rover 'Curiosity' (C) is undergoing pre-flight tests, at the Jet Propulsion Laboratory in Pasadena, California, Sept 16, 2010. [Photo/Agencies]