Presidents of Lithuania Dalia Grybauskaite, Latvia Raimonds Vejonis, Estonia Kersti Kaljulaid, Poland Andrzej Duda, Czech Republic Milos Zeman, Slovakia Andrej Kiska, Hungary Janos Ader, Romania Klaus Iohannis and Bulgaria Rumen Radev unveil a commemorative plaque during a summit of eastern NATO countries in Kosice, Slovakia, February 28, 2019. REUTERS/David W Cerny