Portuguese President Marcelo Rebelo de Sousa (L) and his Latvian counterpart Raimonds Vejonis (C) pose for photos ahead of the summit of the presidents of 13 European Union member states in Rundale, Latvia, Sept. 13, 2018. A two-day summit of the presidents of 13 European Union member states, who form the so-called Arraiolos group, kicked off in Latvia on Thursday. (Xinhua/Janis)