On the morning following a fifth missile test in about two weeks, President Trump tweeted about the new letter, which included "a small apology for testing the short range missiles" and that Kim would like to start more talks at the conclusion of scheduled US-South Korean military exercises.

"He stated, very nicely, that he would like to meet and start negotiations as soon as the joint U.S./South Korea joint exercise are over," Trump tweeted of the letter delivered two days ago. 

Trump described it as "a long letter, much of it complaining about the ridiculous and expensive exercises." No timetable was given in reference to proposed renewed negotiations, only that Kim is open to them occurring after the controversial exercises, according to Trump's characterization of the letter.

According to Bloomberg, citing South Korean officials, there's a "high chance" of another launch as the US-South Korean drills are initiated: 

In the past two weeks, though, North Korea has tested an increasingly sophisticated, hard-to-track missile system that could wipe out South Korean and Japanese cities -- not to mention U.S. forces based in both countries.