Comings and goings: Arms control

Moves afoot in the Obama White House arms control shop: National Security Council non-proliferation hand Rexon Ryu has begun work as the deputy to the U.S. representative to the United Nations, heading up the US/UN's Washington office. Ryu, a former staffer to former Sen. Chuck Hagel (D-Neb.), met with Deputy Secretary of State Thomas Nides [...]