The on-off summit between the United States and North Korea may be on again as North Korea's former head of military intelligence is on his way to New York City to discuss a possible meeting between President Donald Trump and North Korean leader Kim Jong Un.

Trump, naturally, shared this news on Twitter:

Historic talks between the U.S. and North Korea over denuclearization were announced in March, but then Trump called them off after a North Korean foreign ministry official called Vice President Mike Pence a "political dummy" (for comparing their negotiations to how the U.S. negotiated with Libya).

The official traveling to NYC is General Kim Yong Chol, whom the Wall Street Journal reports is "often described as the North Korean leader’s right-hand man... Earlier this month, Gen. Kim met with Secretary of State Mike Pompeo in Pyongyang, hours before North Korea released three American prisoners. He accompanied Kim Jong Un at recent summits with the leaders of China and South Korea, and represented Pyongyang at the closing ceremony of this year’s Winter Olympics, sitting a few feet from Ivanka Trump."

Gen. Kim has also been blamed by South Korea for the 2010 sinking of a South Korean naval vessel, the Cheonan, which killed 46 seaman. Though North Korea had denied responsibility, Gen. Kim reportedly introduced himself to South Korean press—at a historic K-pop performance in North Korea last month—by saying, "I'm Kim Yong Chol, the man you blame of sinking the Cheonan."

After a stopover in Beijing, Gen. Kim is expected in New York on Wednesday. A Stanford University professor who was once director of Los Alamos says that denuclearization of North Korea could take 15 years.