North Korea says it has tested a new hypersonic system designed to strengthen its nuclear deterrent. The tests came just days before U.S. President Donald Trump and China’s Xi Jinping are set to meet in South Korea. Seoul’s military said multiple missiles were fired from near Pyongyang, flying about 350 km before landing on land. The tests mark North Korea’s first since South Korea’s new president, Lee Jae Myung, took office, pledging peace — an offer Kim Jong Un has so far rejected.