Farnborough International Air Show [Getty Images]

Visitors look at an European Aeronautic Defence and Space Company N.V. (EADS) ExoMars Rover Vehicle prototype on display on the first day of the Farnborough International Airshow in Farnborough, U.K., on Monday, July 19, 2010. The Farnborough International Airshow runs from July 19-25. Photographer: Simon Dawson/Bloomberg via Getty Images

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