Trump meeting with Kim Jong Un would be huge, but not the first effort at diplomacy

President Trump has agreed to meet with North Korean leader Kim Jong Un "by May." Here are three other big events in North Korean diplomacy. 

 March 8 at 7:48 PM 

President Trump has agreed to meet with North Korean leader Kim Jong Un for talks by the end of May, an extraordinary development following months of heightened nuclear tension during which the two leaders exchanged frequent military threats and insults.

Kim has also committed to stopping nuclear and missile testing, even during joint military drills in South Korea next month, Chung Eui-yong, the South Korean national security adviser, told reporters at the White House on Thursday. Chung extended the invitation from Kim to meet while briefing Trump on the four-hour dinner he had with the North ­Korean leader in Pyongyang on Monday.

After a year in which North Korea fired intercontinental ballistic missiles capable of reaching all of the United States and tested what is widely thought to have been a hydrogen bomb, such a moratorium would be welcomed by the United States and the world.

But there is also significant risk for Trump in agreeing to a meeting apparently without the kind of firm preconditions sought by previous U.S. administrations. There has never been a face-to-face meeting, or even a phone call, between sitting leaders of the two nations because American presidents have been wary of offering the Kim regime the validation of a leaders-level summit on the global stage.