President Donald Trump on Thursday again downgraded expectations for a nuclear disarmament deal with North Korea, saying it could be a year before U.S. officials know if Kim Jong Un is serious about shutting down his weapons programs.

White House officials have been scrambling to respond to a media report that Kim is rebuilding a missile testing facility, a move that contradicts his pledge to hold off on nuclear and missile tests while engaged with the Trump administration about giving up that program and his nuclear weapons.

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Trump said earlier this week he would be “disappointed” if North Korea was rebuilding the test facility. His national security adviser, John Bolton, repeated that in a Thursday morning television interview. But Bolton also said Trump remains “open” to a third one-on-one summit with Kim even though the second one last week in Hanoi abruptly collapsed.

Despite that high-profile failure — which U.S. officials say came when Kim demanded immediate sanctions relief before giving up any weapons programs — Secretary of State Mike Pompeo said at the time alongside the president in Vietnam that “we made real progress.”