U.S. experts head to North Korea

A group of U.S. experts including John Lewis, professor emeritus at Ploughshares-funded Stanford University headed Tuesday to North Korea for a trip that is expected to include discussions about the country's denuclearization process. The group is the latest of several private-sector delegations from the United States to visit North Korea.  (Ploughshares Fund’s program director Paul Carroll is part of this delegation.)