Photo de stock - German chancellor Angela Merkel gestures after using a microscope during the official opening of the Fraunhofer Institute for Microstructure of Materials and Systems IMWS in Halle, central Germany, Monday, Jan. 25, 2016. Photo: JENS MEYER/dpa |. - Halle (Saale)/Saxony-Anhalt/Germany

Photo de stock: German chancellor Angela Merkel gestures after using a microscope during the official opening of the Fraunhofer Institute for Microstructure of Materials and.

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