South Korea may launch nuclear test to coincide with Obama 's visit to South Korea . Writers : If it 's a more serious provocation , it may signal an uptick in nuclear capability . First , if the United States can not win substantial new sanctions at the U.N. , it should take additional steps in concert with South Korea , Japan and other allies and partners to squeeze the North 's ability to import or export dangerous materials related to their missile and nuclear programs . They consider strong U.N. sanctions necessary to stop a possible trend toward nukes . Writers : U.S. must strengthen ties with S. Korea and Japan and build up its deterrent capability .
South Korea may launch nuclear test to coincide with Obama 's visit to South Korea . Writers : If it 's a more serious provocation , it may signal an uptick in nuclear capability . They consider strong U.N. sanctions necessary to stop a possible trend toward nukes . Writers : U.S. must strengthen ties with S. Korea and Japan and build up its deterrent capability .