An F15 fighter jet sits parked at the Farnborough Air Show p [Getty Images]

UNITED KINGDOM - JULY 13: An F15 fighter jet sits parked at the Farnborough Air Show prior to the event's opening in Hampshire, UK, on Sunday, July 13, 2008. The air show will be open from July 14-20. (Photo by Graham Barclay/Bloomberg via Getty Images)

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