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Military personnel show visitors an AH-64E Apache military helicopter on display on the opening day of the 14th Dubai Air Show at Dubai World Central (DWC) in Dubai, United Arab Emirates, on Sunday, Nov. 8, 2015. The Dubai Air Show is the biggest aerospace event in the Middle East, Asia and Africa and runs Nov. 8 - 12. Photographer: Jasper Juinen/Bloomberg via Getty Images

Military personnel show visitors an AH-64E Apache military helicopter on display on the opening day of the 14th Dubai Air Show at Dubai World Central (DWC) in Dubai, United Arab Emirates, on Sunday, Nov. 8, 2015. The Dubai Air Show is the biggest aerospace event in the Middle East, Asia and Africa and runs Nov. 8 - 12. Photographer: Jasper Juinen/Bloomberg via Getty Images