美国有线新闻 CNN 朝韩首脑举行历史性会晤 金正恩承诺关闭核试验场（在线收听）

Last Friday, we said it was scheduled to happen and it happened. But even some Koreans say it's hard to believe.

For the first time since fighting stopped in the Korean War in 1953, a North Korean leader stepped into South Korean territory. The historic summit between the two nations' leaders have been planned for weeks and they made some potentially world-changing promises — to completely g??et rid of nuclear weapons on the Korean peninsula, to call for a formal end to the war that started in 1950.

According to South Korean President Moon Jae-in's office, North Korean leader Kim Jong Un also promised to shut down his nuclear test site in May and invite experts and journalists from South Korea and the U.S. to come make sure it was close.

There is some controversy around that. Chinese scientists said last week that the test site had been so badly damaged in nuclear explosions that it might not be useful anymore. North Korea's dictator says that's not true, that parts of it are in very good condition.

Either way, after all these apparent breakthroughs, analysts say there's plenty of reason to proceed cautiously. The U.S. President Donald Trump says that even though the meeting between him and North Korea's leader could happen in weeks, it's hard to predict how successful it will be.