North says U.S.-South Korean computer-simulated drills are step to nuclear war

By Christine KimSEOUL (Reuters) - South Korean and U.S. forces began computer-simulated military exercises on Monday amid tension over North Korea's weaponsprograms, while a report Pyongyang has earned millions of dollars in exports is likely to raise doubts about the impact of sanctions.South Korean President Moon Jae-in said the joint drills, called Ulchi Freedom Guardian, were purely defensive and did not aim to increase tension on the peninsula, but North Korea denounced the exercises as pre