the idea was "welcomeable". Trump acknowledged the response as a positive one. After that, another reporter asked if Kim Jong-un was willing to shut down his nuclear program, to which he responded, "If I'm not willing to do that, I wouldn't be here right now." The leaders went into a closed-room meeting, but the planned working lunch between Trump and Kim Jong-un and the potential joint signing ceremony were canceled. After preliminary negotiations between Trump and Kim Jong-un went over a period of time, White House Press Secretary Sarah Huckabee Sanders told reporters waiting to cover the lunch that it had been called off. One month after the summit ended, Reuters reported that on the second day of the summit Trump passed Kim Jong-un a note that bluntly called for North Korea to surrender all its nuclear weapons and fuel, in similar fashion to the "Libya model", a proposal the North Koreans had repeatedly rejected. The scheduled ceremonial luncheon was then abruptly canceled and the summit ended. End of summit On February 28, 2019, the White House announced that the summit was cut short and that no agreement was reached. Sanders did not tell reporters why the schedule was changed and whether there was going to be a signing ceremony; the unexpected turn of events caused stocks on the South Korea stock exchange to fall. Trump said in a press conference after the summit that it was cut short because North Korea wanted an end to economics sanctions. He elaborated and said: "Basically, they wanted the sanctions lifted in their entirety and we couldn't do that [...] We had to walk away from that particular suggestion. We had to walk away from that." During the press conference after the summit, Trump discussed American student Otto Warmbier, who was imprisoned for 17 months by North Korea for conviction of subversion, and who died shortly after being returned comatose to the U.S. Trump said he believed Kim Jong-un's word that he did not personally know about Warmbier's alleged poor treatment when Warmbier was in North Korean custody, and that it was not to Kim Jong-un's benefit to allow Warmbier to be treated poorly. A news conference from North Korea Hours later, in a rare move, North Korean officials called a news conference. Ri offered a different account of his country's position compared to Trump: North Korea had only proposed a partial lifting