Palestinian Christian worshippers and priests take part in an open-air mass to protest against the building of Israel's controversial barrier in the Cremisan Valley, which lies between the sprawling settlement of Gilo in annexed east Jerusalem, and the smaller West Bank settlement of Har Gilo, on August 18, 2015 in the West Bank village of Beit Jala. Palestinian Christians are opposed to Israeli decision to build its controversial separation barrier through the 170-hectare Cremisan Valley on a route they say would cut off their community.  AFP PHOTO / MUSA AL SHAER        (Photo credit should read MUSA AL-SHAER/AFP/Getty Images)