Paul Salopek, National Geographic fellow, looks out over Jerusalem during his seven-year journey by foot from Africa to South America. Bassam Almohor/National Geographic hide caption

itoggle caption Bassam Almohor/National Geographic

Palestinian president Mahmoud Abbas has accused Israel of committing "genocide" against Palestinians, and he has also criticized Hamas for firing rockets on Israel. Abbas Momani/AFP/Getty Images hide caption

itoggle caption Abbas Momani/AFP/Getty Images

A key, symbolizing the Palestinians who lost their homes at the creation of the state of Israel in 1948, sits at the entrance of the West Bank city of Jericho, on Feb. 22. Thomas Coex/AFP/Getty Images hide caption

itoggle caption Thomas Coex/AFP/Getty Images

Nimrod Vider, an Israeli who owns a cafe in the Jordan Valley, part of the Israeli-occupied West Bank. He says he would be willing to leave the West Bank if the Israeli government thought it was the right thing to do. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

A decade ago, Israel's separation barrier cut off Ishaq Amer's home from its Palestinian village. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Cement mixers in Rawabi, a planned Palestinian town in the West Bank, about 25 miles north of Jerusalem. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Palestinian Bashir Tamimi, 57, drinks water from a spring on land that he says belongs to his family. Teenagers from a nearby Israeli settlement built collection pools and brought in picnic tables when they saw no one using the spring. It has now become a source of conflict. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR