TOPSHOTS Palestinian president Mahmud Abbas (4thR) attends a open-air mass led by Pope Francis on May 25, 2014 at the Manger Square outside the Church of the Nativity in the West Bank Biblical town of Bethlehem. Pope Francis urged an end to the "increasingly unacceptable" Israeli-Palestinian conflict, calling on leaders to show "courage" to achieve a peace based on a two-state solution. AFP PHOTO / HAZEM BADER