President Trump is supposed to have a historic meeting with North Korean leader Kim Jong Un next month—but now North Korea, angry over joint military exercises between the US and South Korea that started Friday, is threatening to cancel it. The Korean Central News Agency called the Max Thunder drills between the South Korean and US air forces that are taking place in South Korea over a period of two weeks "an intentional military provocation running counter to the positive political development on the Korean Peninsula," per Yonhap News. The KCNA said high-level talks with South Korea planned for Wednesday were canceled, per the Hill, and that "the United States will also have to undertake careful deliberations about the fate of the planned North Korea-US summit in light of this provocative military ruckus jointly conducted with the South Korean authorities." (More North Korea stories.)