Top American and North Korean officials are holding a full day of meetings in New York on Thursday aimed at deciding whether a summit between President Donald Trump and North Korean leader Kim Jong Un can be salvaged.

Ahead of the meetings, Secretary of State Mike Pompeo and the North’s former military intelligence chief, Kim Yong Chol, had dinner Wednesday night. Kim had flown in from Beijing and Pompeo from Washington.

It’s the highest-level official North Korean visit to the United States in 18 years.

Kim, the former military intelligence chief and one of the North Korean leader’s closest aides, landed midafternoon Wednesday on an Air China flight from Beijing.

During his unusual visit, Kim had dinner for about an hour and a half with Pompeo. The two planned a “day full of meetings” Thursday, the White House said. Their talks will be aimed at determining whether a meeting between Trump and Kim Jong Un, originally scheduled for June 12 but later canceled by Trump, can be restored, U.S. officials have said.

“Good working dinner with Kim Yong Chol in New York tonight,” Pompeo tweeted Wednesday. “Steak, corn, and cheese on the menu.”

Good working dinner with Kim Yong Chol in New York tonight. Steak, corn, and cheese on the menu. pic.twitter.com/1pu4K3oym7

— Secretary Pompeo (@SecPompeo) May 31, 2018

The talks come as preparations for the highly anticipated summit in Singapore were barreling forward on both sides of the Pacific Ocean, despite lingering uncertainty about whether it will really occur, and when. As Kim and Pompeo met in New York, other U.S. teams were meeting with North Korean officials in Singapore and in the heavily fortified Korean Demilitarized Zone.

“If it happens, we’ll certainly be ready,” White House spokeswoman Sarah Huckabee Sanders said of the Singapore summit. Regarding the date for the meeting, she added, “We’re going to continue to shoot for June 12th.”

North Korea’s flurry of diplomatic activity following a torrid run in nuclear weapons and missile tests in 2017 suggests that Kim Jong Un is eager for sanctions relief to build his economy and the international legitimacy the summit with Trump would provide. But there are lingering doubts on whether Kim will ever fully relinquish his nuclear arsenal, which he may see as his only guarantee of survival in a region surrounded by enemies.

Pompeo, Trump’s former CIA chief, has traveled to Pyongyang twice in recent weeks for meetings with Kim Jong Un, and has said there is a “shared understanding” between the two sides about what they hope to achieve in talks. South Korean media speculated that Pompeo could make a third trip to Pyongyang and that Kim Yong Chol was carrying a personal letter from Kim Jong Un and might push to travel to Washington to meet with Trump.

The potential summit between @POTUS and Chairman Kim presents #DPRK with a great opportunity to achieve security and economic prosperity. The people of #NorthKorea can have a brighter future and the world can be more peaceful.

— Secretary Pompeo (@SecPompeo) May 31, 2018

North Korea’s mission to the United Nations in New York is its sole diplomatic presence in the United States. That suggests Kim might have chosen to first go to New York because it would make it easier for him to communicate with officials in Pyongyang, North Korea’s capital. North Korea and the United States are still technically at war and have no diplomatic ties because the 1950-53 Korean War ended with an armistice, not a peace treaty.

Trump views a summit as a legacy-defining opportunity to make the nuclear deal that has evaded others, but he pledged to walk away from the meeting if he believed the North wasn’t serious about discussing dismantling its nuclear program.

After the North’s combative statements, there was debate inside the Trump administration about whether it marked a real turn to belligerence or a feint to see how far Kim Jong Un could push the U.S. in the lead-up to the talks. Trump had mused that Kim’s “attitude” had changed after the North Korean leader’s surprise visit to China two weeks ago, suggesting China was pushing Kim away from the table. Trump’s open letter to Kim last week canceling the summit, the aides said, was designed to pressure the North on the international stage for appearing to have cold feet.

White House officials maintain that Trump was hopeful the North was merely negotiating but that he was prepared for the letter to mark the end of the two-month flirtation. Instead, the officials said, it brought both sides to the table with increasing seriousness, as they work through myriad logistical and policy decisions to keep June 12 a viable option for the summit.

Kim Yong Chol is a vice chairman of the North Korean ruling party’s central committee. The last official of his stature to visit the United States was Jo Myong Rok, the late first vice chairman of the National Defense Commission, who visited Washington in 2000, South Korea’s Unification Ministry said.

The White House emphasized that it has remained in close contact with South Korean and Japanese officials as preparations for the talks continue. Sanders said Trump will host Japanese Prime Minister Shinzo Abe of Japan on June 7 to coordinate their thinking ahead of the summit. Trump hosted South Korean President Moon Jae-in last week.

Moon, who has lobbied hard for nuclear negotiations between Trump and Kim Jong Un, held a surprise meeting with the North Korean leader on Saturday in an effort to keep the summit alive.

(AP)