SEOUL - North Korean state news agency KCNA said on Friday it tested a new nuclear underwater attack drone under leader Kim Jong Un's guidance this week, as a U.S. amphibious assault ship arrived in South Korea for joint drills. The North's state news agency also confirmed it fired cruise missiles during the weapon test and firing drill that took place from Tuesday to Thursday. During the drill, the North Korean drone cruised underwater for over 59 hours and detonated in waters off its east coast on Thursday, the KCNA said. It did not elaborate on the drone's nuclear capabilities. The drone system is intended to make sneak attacks in enemy waters and dest...Keep on reading: North Korea says it tested new nuclear underwater attack drone – KCNA