According to a report by NBC News, North Korea may be calling off high-level talks with South Korea, citing ongoing military exercises between South Korea and the United States. South Korean Yonhap news agency reported that North Korea views the Max Thunder drills between the South and U.S. Air Forces to be a rehearsal for an invasion and a provocative move amid signs of improving ties. State Department spokeswoman Heather Nauert told reporters on Tuesday that the U.S.