U.S. President Donald Trump (L) welcomes visiting Romanian President Klaus Iohannis at the White House in Washington D.C., the United States, on June 9, 2017. U.S. President Donald Trump said during a press conference with Klaus Iohannis on Friday for the first time that he was committed to the NATO charter's Article 5 on mutual defense. (Xinhua/Yin Bogu)
