Secretary of State Clinton today formally opened the first direct talks in almost two years between Israel and the West Bank Palestinians. In a public ceremony, she addressed Israeli Prime Minister Benjamin Netanyahu and Palestinian President Mahmoud Abbas. Under non-stop pressure from the United States, the challenge is to resolve decades-long disagreements in the next year, but even advocates of a Palestinian state say failure could make matters worse. How far apart are they on settlements, borders, the "right of return" and the status of Jerusalem? Neither Abbas nor Netanyahu has much domestic support for historic compromise. Did they come together because of their worries about Iran?