 It also urged all member states to encourage North Korea to respond positively to this resolution and to facilitate a solution of the nuclear issue.U.S.–North Korea talks began in June 1993 but with lack of progress in developing and implementing an agreement, North Koreans unloaded the core of a major nuclear reactor, which could have provided enough raw material for several nuclear weapons.With tensions high, Kim Il Sung invited former U.S. President Jimmy Carter to act as an intermediary.