On The Production Line At MTU Aero Engines AG [Getty Images]

Sparks fly as metallic powders are fused together to create a tool for aircraft engines using the selective laser melting (SLM) process at the MTU Aero Engines factory in Munich, Germany, on Monday, Nov. 25, 2013. MTU Aero Engines Holding AG said it will eliminate jobs and cut costs to boost profitability as the German manufacturer predicted strong growth in sales of new engines next year. Photographer: Krisztian Bocsi/Bloomberg via Getty Images

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