The commissioners of the New York City Police and Fire Departments said yesterday that for the first time they would exchange liaison officers and carry out specialized training together.
Once they reach a broad deal, analysts said, Mr. Kim could move to dismantle production facilities for intercontinental ballistic missiles and allow access to nuclear sites in the North; the two leaders could exchange liaison offices in Pyongyang and Washington; and Mr. Trump could ease sanctions, especially those that affect ordinary North Koreans.
In addition, North Korea has resisted even exchanging liaison offices, a step toward eventual diplomatic relations.
In an effort to improve coordination between the Police and Fire Departments, Mr. Kelly and the fire commissioner, Nicholas Scoppetta, have exchanged liaison officers.
"If that doesn't happen, it would be hard not only for Congress, but the Administration to proceed with other discussions, like exchanging liaison offices". American officials said they told North Korea that the wisest course would be to follow what South Korea did last January after capturing two North Korean soldiers who drifted into South Korean waters.
The two sides have exchanged liaison offices and are working out the various details regarding borders and trade.
During the operation, NATO and the UN exchanged liaison officers for the first time in their respective histories, establishing a precedent for military cooperation between the two.
But that was much less specific than the 1994 pledge to exchange diplomatic liaison offices, and the 2005 pledge to work for a peace treaty to end the Korean War.
Instead, American negotiators have been studying noneconomic incentives for the North, such as an end-of-war declaration or the exchange of liaison offices between Pyongyang and Washington, according to South Korean officials familiar with Washington's talks with North Korean officials.
Today's growth in international marriage, however, is mostly urban, with exchange-student liaisons accounting for many romances.
French Canadian students attended universities in France, teachers were exchanged, and some liaison developed between the press of the two countries, all of which were encouraged by Canada's Department of External Affairs.
