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German Minister of Education and Research, Johanna Wanka (CDU) and technician Juergen Graeser release a balloon with ozone and radio sensors from the AWIPEV research station in Spitsbergen, Norway, 09 April 2015. The Minister of Education and Research informs herself of the work of different research institutes on Spitsbergen in the Arctic Polar sea during a journey through the Arctic. Photo: JENS BUETTNER/dpa | usage worldwide (KEYSTONE/DPA/Jens Büttner)