SEOUL - South Korean President Moon Jae-in has asked the United Nations to help verify North Korea's planned shutdown of its nuclear test site, South Korea's Yonhap news agency said Tuesday. Moon made the request in a phone call Tuesday with UN Secretary-General Antonio Guterres, Yonhap reported. Several days before Friday's historic summit between Moon and North Korea's Kim Jong Un, the North had promised to dismantle its Punggye-ri nuclear test site to 'transparently guarantee' its dramatic commitment to stop all nuclear and missile tests