SEOUL, South Korea (AP) — North Korean leader Kim Jong Un warned he’s ready to use his nuclear weapons in potential military conflicts with the United States and South Korea, state media said Thursday, as he unleashed fiery rhetoric against rivals he says are pushing the Korean Peninsula to the brink of war. Kim’s speech to war veterans on the 69th anniversary of the end of the 1950-53 Korean War were apparently meant to boost internal unity in the impoverished country suffering pandemic-related economic difficulties. North Korea will likely intensify its threats against the United States and South Korea as the allies prepare to expand summertime exercises the North views as an invasion rehearsal, some observers say.