title: South Korea says North Korea must stop challenging peace, end nuclear program
text: SEOUL (Reuters) - South Korea welcomed on Tuesday a new U.N. Security Council resolution imposing additional sanctions on North Korea over its sixth nuclear test and said the only way for Pyongyang to escape isolation and economic hardship is to end its nuclear program.  North Korea needs to realize that a reckless challenge against international peace will only bring about even stronger international sanctions against it,  the South s presidential Blue House said. 