In this photo taken Monday, Sept. 9, 2013, a Palestinian man walks by a barrier separating the West Bank town of Abu Dis, from east Jerusalem with Arabic graffiti that reads, “PLO, no for negotiations,” seen on the side of Abu Dis, West Bank. Twenty years after the two sides signed the Declaration of Principles on the White House lawn, the words that launched Israeli-Palestinian talks on dividing the Holy Land into two states ring hollow to many on both sides. Negotiators said mistakes they made then cause damage to this day. PLO refers to the Palestine Liberation Organization. (AP Photo/Nasser Nasser)