South Korea's president says he'll tell world leaders about the need to faithfully enforce UN sanctions on North Korea and block the country's illicit activities to fund its weapons programs when they converge in Indonesia and India for annual summits this week. President Yoon Suk Yeol is to visit Jakarta for four days starting Tuesday to attend a series of summits scheduled on the margins of a meeting of Association of Southeast Asian Nations (ASEAN) leaders. On Friday, he'll travel on to New Delhi for a summit of the leading rich and developing nations. “At the upcoming ASEAN-related Summits and…