PYONGYANG, North Korea (AP) — North Korea has suggested it might call off its 20-month suspension of nuclear and missile tests because of summertime U.S.-South Korean military drills that the North calls preparation for an eventual invasion. The statement by the North’s Foreign Ministry comes amid a general deadlock in nuclear talks, but after a meeting of the U.S. and North Korean leaders at the Korean border raised hopes that negotiations on the North’s growing nuclear and missile arsenal would soon resume.