The U.S. and the United Arab Emirates have discussed with each other the possibility of lifting sanctions on Syrian President Bashar al-Assad if he peels himself away from Iran and cuts off weapons routes to Lebanon's Hezbollah, five people familiar with the matter said. The conversations intensified in recent months, the sources said, driven by the possible expiry on Dec. 20 of sweeping U.S. sanctions on Syria and by Israel's campaign against Tehran's regional network, including Hezbollah in Lebanon, Hamas in Gaza and Iranian assets in Syria.