Costa Rica's Grynspan narrowly ahead in race to be next UN chief, sources say

​An ‌informal poll by the United Nations Security ‌Council on ‌Friday placed former Costa Rican ⁠Vice ​President ⁠Rebeca Grynspan as ⁠the narrow frontrunner in ​the race to ⁠become the ⁠10th ​UN secretary-general, two sources close ⁠to the process ⁠said.