ສະຫະລັດ: ການທົດລອງນິວເຄລຍຂອງເກົາຫລີເໜືອ ເປັນໄພຂົ່ມຂູ່ຮ້າຍແຮງ

U.S. leaders have condemned North Korea’s announced test of a nuclear device - the third since 2006. U.S. intelligence agencies, meanwhile, are analyzing the blast to learn whether North Korea’s nuclear program is making progress. VOA Pentagon correspondent Luis Ramirez reports.