Foto de stock - A research airplane from the German Aerospace Center (DLR) flies over the the airport in Frankfurt am Main, Germany, 26 September 2016. It is testing a new software that will make airplanes quieter when landing. The goal is for pilots to potentially land without extra acceleration and breaking.  Photo: FRANK RUMPENHORST/dpa | usage worldwide. - Frankfurt/Main/Hesse/Germany

Imagen: A research airplane from the German Aerospace Center (DLR) flies over the the airport in Frankfurt am Main,  Germany, 26 September 2016.

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