At the direction of President Donald J. Trump, Secretary of State Mike Pompeo and other representatives of the United States government traveled to Pyongyang, North Korea on May 9 to prepare for the President's upcoming meeting with North Korean leader Kim Jong Un. During Secretary Pompeo's visit, the North Korean leadership released three American detainees. President Trump appreciates leader Kim Jong Un's action to release these American citizens, and views this as a positive gesture of goodwill. The three Americans appear to be in good condition and were all able to walk on the plane without assistance. All Americans look forward to welcoming them home and to seeing them reunited with their loved ones.
Donald J. Trump (1st Term), Statement by the Press Secretary on the Release of Three Americans Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/335617