North Korea called on the U.S. military on Friday to halt a joint training exercise with South Korean forces, saying the drills could scuttle a deal to end Pyongyang’s nuclear weapons program. Some South Korean government officials have said Seoul is considering a delay of the Ulchi Focus Lens exercise, which is scheduled to run from August 20-31, so as not to derail a rare summit of the two Koreas at the end of the month. Full Story