Kerry & Zarif in Switzerland; Rest of Parties to Join

The U.S. & Iranian principals met Monday "in the Swiss city of Lausanne to try to narrow gaps before a March 31 deadline for a political agreement. The meeting included U.S. Secretary of Energy Ernest Moniz and Iran's nuclear chief Ali Akbar Salehi, who also met on Sunday to negotiate technical details on how to curb Iran's nuclear program."  The rest of the parties will join sometime this week.