High-ranking North Korean emissary heading back to Washington, DC, to plan second summit between Kim and Trump

North Korean negotiator Kim Yong Chol is reportedly on his way to Washington, D.C. to help reach an agreement regarding when and where a second summit between President Donald Trump and North Korean dictator Kim Jong Un could take place, CNN reported.

Here's what we know

Kim Yong Chol previously visited the White House and met with Trump June 1, before Trump's June 12 summit with Kim Jong Un in Singapore. No details have been released yet regarding when or where a meeting between Kim Yong Chol and U.S. officials might take place, or if he will be visiting the White House during this trip.

Kim is a former North Korean spymaster, who is now one of the country's top negotiators.

"We are working to make progress on our goal of achieving the final, fully verified denuclearization of North Korea, and the President looks forward to meeting Chairman Kim again at their second summit at a place and time yet to be determined," a spokesperson for the White House told CNN.

The BBC reported that Kim Yong Chol is carrying another letter from Kim Jong Un to Trump. He brought one of these letters to his June meeting with Trump. Trump called that initial letter "very nice." The two leaders have reportedly sent several other letters to each other in the intervening months.

What else?

In a televised address on Jan. 1, Kim Jong Un said that he wanted to meet with Trump again and to reach an agreement between the two countries. However, he also warned that if the U.S. failed to lift sanctions, he would be "left with no choice but to consider a new way to safeguard our sovereignty and interests."