Israel's President Reuven Rivlin (R) shakes hands with Chairman of the Joint Chiefs of Staff U.S. Army General Martin Dempsey during their meeting in Jerusalem June 10, 2015. Rivlin expressed his concern to the United States on Wednesday about the fate of the Druze minority in Syria, saying around 500,000 of them were under threat from Islamist militants in an area near the Israeli border. REUTERS/Ronen Zvulun