(FILES) In this file photo North Korea's leader Kim Jong-un walks to a meeting with US President Donald Trump in the Demilitarized Zone (DMZ) on June 30, 2019, in Panmunjom, Korea. - North Korean leader Kim Jong Un has made his first public appearance since speculation about his health began last month, cutting the ribbon at the opening of a fertilizer factory, KCNA reported on May2. (Photo by Brendan Smialowski / AFP)