Turkish Foreign Minister Mevlut Cavusoglu (C), Romanian Foreign Minister Teodor Melescanu (R) and Polish Foreign Minister Jacek Czaputowicz attend a press conference in Ankara, Turkey, on April 19, 2019. Turkish Foreign Minister Mevlut Cavusoglu said at a press conference with his Romanian and Polish counterparts on Friday that Turkey understands NATO's concerns over its procurement of the Russian S-400 air defense missiles. (Xinhua/Mustafa Kaya)