Greek Prime Minister Alexis Tsipras, U.S. President Donald Trump and Hungarian Prime Minister Viktor Orban (from L to R) take part in the family photo session during the North Atlantic Treaty Organization (NATO) summit in Brussels, Belgium, on July 11, 2018. The North Atlantic Treaty Organization (NATO) summit began Wednesday in Brussels with verbal fireworks as recent tensions between allies and the United States were laid bare by U.S. President Donald Trump in a growing row over burden sharing and foreign influence. (Xinhua/Ye Pingfan)