The notice providing the eight-day window came as South Korean President Yoon Suk Yeol, Chinese Premier Li Qiang and Japanese Prime Minister Fumio Kishida are scheduled to hold a rare trilateral meeting
The warning came on Sunday from the hermit nation s Vice-Defence minister Kim Gang Il. The defence official maintained that the US had flown at least 16 of its RC-135 and U-2S strategic reconnaissance planes and RQ-4B drone over the Korean peninsula.