Riyadh - US President Donald Trump during his first trip abroad met leaders of the Gulf Cooperation Council, at the King Abdulaziz Conference Center, Sunday, May 21, 2017, in Riyadh, Saudi Arabia. Trump will use the nation that is home to Islam's holiest site as a backdrop to call for Muslim unity in the fight against terrorism Sunday, as he works to build relationships with Arab leaders. Trump says during a meeting with the Emir of Kuwait on Sunday that he'll hold a news conference in two weeks to discuss the battle against the Islamic State terrorist group. Trump has been holding a whirlwind of meetings with Arab leaders in Saudi Arabia in the hours before he delivers a speech on how the Islamic world can help fight extremism.