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Polish President Andrzej Duda (R) and NATO Secretary General Jens Stoltenberg attend a joint press conference at Belweder Palace in Warsaw, Poland, on May 28, 2018. (Xinhua/Maciej Gillert)
Polish President Andrzej Duda (R) and NATO Secretary General Jens Stoltenberg attend a joint press conference at Belweder Palace in Warsaw, Poland, on May 28, 2018. (Xinhua/Maciej Gillert)