At what point does the Palestinian leadership have to quit peace talks just to save face? Once again, President Mahmoud Abbas said Tuesday that the Palestinians will have to quit peace talks if Israel allows settlement construction in the West Bank to continue. "We don't want to stop the talks, but if the building continues, we will have to put a stop to them," Abbas said. A moratorium on settlement construction expired Monday. The United States has rushed special envoy George Mitchell to the region to try to salvage the negotiations.