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German President Frank-Walter Steinmeier (C) attends commemoration for the 1st anniversary of the attack on a Christmas market at Breitscheidplatz of Berlin, capital of Germany, on Dec. 19, 2017. (Xinhua/Shan Yuqi)
German President Frank-Walter Steinmeier (C) attends commemoration for the 1st anniversary of the attack on a Christmas market at Breitscheidplatz of Berlin, capital of Germany, on Dec. 19, 2017. (Xinhua/Shan Yuqi)