Palestinian militants of the Nasser Salah al-Din Brigades the military wing of the Popular Resistance movement watch the opening session of the Arab American Islamic summit held in the Saudi capital Riyadh, with the participation of US President Donald Trump, and Saudi Arabia's King Salman bin Abdulaziz al-Saud, in Gaza city on May 21, 2017. President Trump will meet President Abbas in Bethlehem on May 23. There, Trump will visit the Church of the Nativity. Photo by Ashraf Amra